A fuel filter

Abstract

The utility model provides a kind of fuel filter, belong to automobile parts field.It solves the problem that existing fuel filter connection place is prone to oil seepage and oil dripping.This fuel filter, including the filter main body with multiple fuel interfaces, fuel pipe is connected to fuel interface, the filter main body is equipped with connecting seat at fuel interface, connecting seat is equipped with interface ring groove, interface ring groove side wall is equipped with oil collection groove, sealing structure is equipped between fuel interface and fuel pipe connection place, sealing structure includes connector and sealing sleeve, sealing sleeve outer diameter is greater than fuel interface inner diameter, its one end is equipped with the extrusion part of inclined structure, the other end extends several limit ends axially, inclined extrusion part still extends several embedded strips axially, embedded strip, sealing sleeve and limit end are integrally formed structure, by screwing connector, inclined extrusion part is extruded deformation by fuel interface inner wall to realize sealing.The utility model has the advantages of high sealing connection and oil dripping prevention.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts and relates to a filter, particularly a fuel filter. Background Technology

[0002] The fuel filter is a key component of the fuel system. Its core function is to filter out impurities in the fuel, ensuring that the fuel entering the engine combustion chamber is clean and pure. This effectively protects the precision high-pressure fuel pump, fuel injectors and other core components from wear and blockage, ensuring smooth engine operation, reducing failure rate and extending service life.

[0003] However, traditional fuel filters use simple threaded connections for their inlet and outlet. Under long-term use or in environments with vibrations, the connection between the fuel filter inlet / outlet and the fuel line can easily loosen, leading to oil leakage and dripping. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a fuel filter to solve these issues.

[0005] The purpose of this utility model can be achieved through the following technical solution: a fuel filter, comprising a filter body with multiple fuel ports, wherein each fuel port is externally connected to a fuel pipe, characterized in that the fuel ports are arranged in a relative structure on both sides of the filter body, and a connecting seat is provided on the filter body located at the fuel ports;

[0006] The connector has an interface annular groove surrounding the fuel inlet, and the side wall of the interface annular groove has an oil collection groove for collecting leaked fuel.

[0007] A sealing structure is provided between the fuel inlet and the fuel line to prevent loosening and fuel leakage.

[0008] The sealing structure includes a connector threaded to the fuel interface and a sealing sleeve sleeved outside the connector. The outer diameter of the sealing sleeve is larger than the inner diameter of the fuel interface. One end of the sealing sleeve is provided with an inclined extrusion part, and the other end extends axially to extend several limiting ends.

[0009] The inclined extrusion part also extends axially into several embedded strips. The embedded strips, sealing sleeve, and limiting end are integrally formed. By tightening the connector, the inclined extrusion part is deformed by the inner wall of the fuel interface to achieve a seal.

[0010] In one of the aforementioned fuel filters, the limiting end is embedded in the outer surface of the connector to limit the radial displacement of the sealing sleeve.

[0011] In one of the aforementioned fuel filters, the insert strip is embedded in the external threaded section of the connector to prevent the sealing sleeve from rotating circumferentially.

[0012] In one of the aforementioned fuel filters, the oil collection groove is an annular groove, the bottom of which is lower than the bottom surface of the interface annular groove.

[0013] In one of the aforementioned fuel filters, the angle of the inclined extrusion section matches the chamfer of the fuel inlet.

[0014] In one of the aforementioned fuel filters, the depth of the interface annular groove is greater than the depth of the oil collection groove, forming a stepped anti-overflow structure.

[0015] Compared with existing technologies, this fuel filter significantly improves sealing reliability and leak-proof capability through its sealing structure and connector structure design. Its core lies in the use of an integrated sealing sleeve with an inclined compression section, an insert strip, and a limiting end. When the connector is tightened, it can adaptively deform to form a tight seal. The insert strip and limiting end achieve circumferential anti-rotation and radial limiting, effectively solving leakage problems caused by vibration and loosening. Simultaneously, the stepped interface annular groove surrounding the interface and the low-level oil collection groove provide double protection, actively collecting and accommodating trace amounts of leaked oil to prevent overflow. Ultimately, it achieves a long-lasting and stable sealing effect under harsh operating conditions, balancing equipment safety and environmental protection. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the fuel filter.

[0017] In the diagram, 1 is the filter body; 2 is the fuel pipe; 3 is the connector; 4 is the fuel interface; 5 is the interface annular groove; 6 is the oil collection groove; 7 is the connector; 8 is the sealing sleeve; 9 is the extrusion part; 10 is the limiting end; and 11 is the embedding strip. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1As shown, this fuel filter includes a filter body 1 with multiple fuel inlets 4. Fuel pipes 2 are connected to the fuel inlets 4. The fuel inlets 4 are arranged opposite each other on both sides of the filter body 1. A connecting seat 3 is provided on the filter body at the fuel inlets 4. The connecting seat 3 has an interface annular groove 5 surrounding the fuel inlets 4. The side wall of the interface annular groove 5 has an oil collection groove 6 for collecting leaked fuel. A sealing structure is provided between the fuel inlet 4 and the fuel pipe 2 to prevent loosening and leakage of oil. The sealing structure includes a connector 7 threaded to the fuel inlet 4 and a sealing sleeve 8 sleeved on the outside of the connector 7. The outer diameter of the sealing sleeve 8 is larger than the inner diameter of the fuel inlet 4. One end of the sealing sleeve 8 has an inclined extrusion part 9, and the other end extends axially to several limiting ends 10. The inclined extrusion part 9 also extends axially to several embedding strips 11. The embedding strips 11, the sealing sleeve 8 and the limiting ends 10 are integrally formed. By tightening the connector 7, the inclined extrusion part 9 is deformed by the inner wall of the fuel inlet 4 to achieve a seal.

[0020] The limiting end 10 is embedded in the outer surface of the connector 7 to limit the radial displacement of the sealing sleeve 8. The insert strip 11 is embedded in the external thread section of the connector 7 to prevent the sealing sleeve 8 from rotating circumferentially. The oil collecting groove 6 is an annular groove, the bottom of which is lower than the bottom surface of the interface annular groove 5. The inclined angle of the inclined extrusion part 9 matches the inlet chamfer of the fuel interface 4. The depth of the interface annular groove 5 is greater than the depth of the oil collecting groove 6, forming a stepped anti-overflow structure.

[0021] Through the design of the sealing structure and connecting seat 3, the sealing reliability and leakage prevention capability are significantly improved. The core of this design is the use of an integrated sealing sleeve 8 with an inclined extrusion part 9, an embedded strip 11, and a limiting end 10. When the connecting head 7 is tightened, it can adaptively deform to form a tight seal. The embedded strip 11 and the limiting end 10 achieve circumferential anti-rotation and radial limiting, effectively solving the leakage problem caused by vibration and loosening. At the same time, the stepped interface annular groove 5 surrounding the interface and the low-level oil collection groove 6 form a double protection, actively collecting and accommodating trace amounts of leaking oil to prevent it from overflowing. Ultimately, a long-term and stable sealing effect is achieved under harsh working conditions, taking into account both equipment safety and environmental protection.

[0022] Working principle

[0023] Fuel flows in from the fuel inlet 4 on one side of the filter body 1, is filtered by the internal filter element (although not explicitly stated in the claims, this is the core function of the filter), removes impurities, and then flows out from the opposite fuel inlet 4 on the other side to supply the engine. The fuel pipe 2 is threadedly connected to the fuel inlet 4 of the filter body 1 via a connector 7. When the connector 7 is tightened, it pushes the sealing sleeve 8 into the fuel inlet 4. The inclined pressing portion 9 at the front end of the sealing sleeve 8 contacts the inner wall (usually chamfered) of the fuel inlet 4. With further tightening, the inclined pressing portion 9 is subjected to radial compression and axial compression from the inner wall of the fuel inlet 4, forcing this portion of the material to deform and fill the gap. The deformed pressing portion 9 fits tightly against the inner wall of the fuel inlet 4 and the relevant surface of the connector 7, forming an effective radial and axial seal, preventing fuel from leaking along the threads or interface gaps. The outer surface of the connector 7 is embedded to prevent radial movement or detachment of the sealing sleeve 8 during use or vibration, ensuring it remains in the correct position. The external threaded section of the connector 7 is embedded to prevent circumferential rotation of the sealing sleeve 8 relative to the connector 7. This ensures that during tightening or any possible micro-movements, the sealing sleeve 8 will not wear or change its contact with the fuel interface 4 due to rotation, thus maintaining the stability of the seal.

[0024] Even if a small amount of fuel leaks out due to aging, vibration, or installation problems in the main sealing structure, the leaked oil will first enter the interface annular groove 5 surrounding the fuel inlet 4.

[0025] The oil collection tank 6 on the side wall of the interface annular groove 5 serves as a dedicated collection pool, with its bottom designed to be lower than the bottom surface of the interface annular groove 5. This allows the oil to flow more effectively into the oil collection tank 6 and be temporarily stored, rather than flowing directly to the outside of the filter body 1. The depth of the interface annular groove 5 is greater than the depth of the oil collection tank 6, creating a height difference. This structure increases the oil storage capacity and provides a clear path for the oil to flow from the annular groove to the oil collection tank 6, effectively preventing the oil from dripping directly due to shaking or slight overflow from the annular groove. The oil must ultimately reach a higher liquid level to overflow from the oil collection tank 6.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0027] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A fuel filter comprising a filter body (1) having a plurality of fuel inlets (4), wherein fuel inlets (4) are externally connected to fuel pipes (2), characterized in that, The fuel inlets (4) are arranged opposite each other on both sides of the filter body (1), and the filter body located at the fuel inlets (4) is provided with a connecting seat (3). The connecting seat (3) has an interface annular groove (5) surrounding the fuel inlet (4), and the side wall of the interface annular groove (5) has an oil collection groove (6) for collecting the leaked fuel. A sealing structure is provided between the fuel inlet (4) and the fuel pipe (2) to prevent loosening and leakage of oil. The sealing structure includes a connector (7) threaded to the fuel inlet (4) and a sealing sleeve (8) sleeved outside the connector (7). The outer diameter of the sealing sleeve (8) is larger than the inner diameter of the fuel inlet (4). One end of the sealing sleeve (8) is provided with an inclined compression part (9), and the other end extends axially to a number of limiting ends (10). The inclined extrusion part (9) also extends axially into several embedded strips (11). The embedded strips (11), the sealing sleeve (8) and the limiting end (10) are integrally formed. By tightening the connector (7), the inclined extrusion part (9) is deformed by the inner wall of the fuel interface (4) to achieve sealing.

2. A fuel filter according to claim 1, characterized in that, The limiting end (10) is embedded on the outer surface of the connector (7) to limit the radial displacement of the sealing sleeve (8).

3. A fuel filter according to claim 1, characterized in that, The insert strip (11) is inserted into the external thread section of the connector (7) to prevent the sealing sleeve (8) from rotating circumferentially.

4. A fuel filter according to claim 1, characterized in that, The oil collection groove (6) is an annular groove, and the bottom of the groove is lower than the bottom surface of the interface annular groove (5).

5. A fuel filter according to claim 1, characterized in that, The angle of the inclined extrusion section (9) matches the inlet chamfer of the fuel inlet (4).

6. A fuel filter according to claim 1, characterized in that, The depth of the interface annular groove (5) is greater than the depth of the oil collection groove (6), forming a stepped anti-overflow structure.

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