Automobile oil filling pipe with good sealing performance

Abstract

The utility model relates to the field of automobiles, in particular to an automobile oil filling pipe with good sealing performance, which comprises an oil filling pipe and the like. One end of the oil filling pipe is an oil filling port for adding gasoline, the other end of the oil filling pipe is an oil outlet, and the oil outlet is a butt joint port of an automobile oil tank; the first sealing gasket is arranged at the port of the oil filling port of the oil filling pipe, and the first sealing gasket is used for sealing the outer side of the oil filling port. The first sealing gasket is arranged at the end opening of the oil filling opening to seal the outer side of the oil filling opening, fuel oil is prevented from leaking from the outside, the second sealing gasket is arranged in the oil cover, and it is ensured that the second sealing gasket is tightly attached to the oil filling opening after the oil cover is tightened, and the sealing performance is further improved. And meanwhile, the third sealing gasket and the fourth sealing gasket are arranged between the butt joint positions of the two flange connecting rings, the sealing performance of the two flange connecting rings after butt joint is further improved, and the sealing performance of the oil filling pipe is ensured through the combined action of the multi-layer sealing design.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to an automobile refueling pipe with good sealing performance. Background Art

[0002] With the development of the automotive industry, the requirements for automotive parts are constantly increasing. Among them, the fuel filler pipe is a key component connecting the fuel tank and the fuel filler port. Its performance directly affects the safety and reliability of the vehicle. Early automobile fuel filler pipes were mostly made of metal, but due to problems such as heavy weight and easy corrosion, they were gradually replaced by lighter and more corrosion-resistant plastics or composite materials. However, regardless of the material, the fuel filler pipe must have good sealing to prevent fuel leakage. This is not only for safety reasons, but also to meet increasingly stringent environmental standards.

[0003] Although traditional automobile fuel pipes can meet basic fuel delivery needs during the design and manufacturing process, they have certain limitations in terms of sealing and durability. Traditional connection methods such as simple snap-on or threaded connections are prone to loosening or aging after long-term use, resulting in an increased risk of fuel leakage. In addition, traditional fuel pipes are usually made of rubber or plastic materials, which are prone to aging after long-term exposure to harsh environmental conditions such as fuel, high temperature and ultraviolet rays, affecting the sealing performance, and the installation process is also relatively complicated. Some traditional connection methods require complex tools and steps, which increases the difficulty of installation and maintenance. Therefore, it is necessary to improve the automobile fuel pipe and design an automobile fuel pipe with good sealing performance. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, an automobile refueling pipe with good sealing performance is provided.

[0005] The technical solution is: a car refueling pipe with good sealing performance, including a refueling pipe, one end of the refueling pipe is a refueling port for adding gasoline, and the other end of the refueling pipe is a refueling port, and the refueling port is a docking port of the car fuel tank; it also includes: a first sealing gasket, which is arranged at the refueling port of the refueling pipe, and the first sealing gasket is used to seal the outside of the refueling port; an oil cap, which is installed at the port of the refueling port by threads; a second sealing gasket is arranged inside the oil cap, and the second sealing gasket is used to improve the sealing between the oil cap and the refueling pipe, and a pressing piece is provided between the oil cap and the second sealing gasket, and the pressing piece acts on the second sealing gasket so that the second sealing gasket can seal the inside of the oil cap; a flange connecting ring is provided, which is provided as two butting together, and one of the flange connecting rings is arranged at the inlet of the car fuel tank. At the oil outlet, another flange connecting ring is arranged at the oil outlet of the filler pipe; a bolt assembly, the two flange connecting rings are stably docked and installed through the bolt assembly; a gasket is arranged between the bolt assembly and the flange connecting ring, and the gasket is used to increase the stability of the bolt assembly connection; a fourth sealing gasket is arranged at the inner tube wall of the two flange connecting rings, and the fourth sealing gasket is used to improve the sealing of the inner ring at the docking point of the two flange connecting rings. After unscrewing the oil cap at the oil filling port of the filler pipe, refueling can be conveniently carried out. After screwing the oil cap back to the oil filling port, the first sealing gasket and the second sealing gasket are used to keep the oil filling port and the oil cap in good sealing. At the same time, the oil outlet is conveniently flange-connected and installed through the two flange connecting rings in conjunction with the bolt assembly, and the fourth sealing gasket is used to improve the sealing between the filler pipe and the fuel tank.

[0006] In one embodiment, the clamping member includes: a guide sleeve, which is provided in plurality and circumferentially arranged on the inner wall of the oil cap; a sliding rod, each of which is slidably connected in each of the guide sleeves, and one end of the sliding rod is fixed to the second sealing gasket; a first spring, which is arranged between the guide sleeve and the sliding rod, and the first spring acts on the second sealing gasket through the sliding rod. When the oil cap is screwed on the oil filling port of the fuel filler pipe, the second sealing gasket can be tightly attached to the oil filling port of the fuel filler pipe, thereby improving the sealing between the oil cap and the fuel filler pipe.

[0007] In one embodiment, an annular placement groove is provided on the inner ring of one side of the flange connection ring, and a third sealing gasket is provided in the placement groove of the flange connection ring. The third sealing gasket is used to further improve the sealing performance after the two flange connection rings are docked.

[0008] In one embodiment, guide rails are provided on the outer walls of the two flange connecting rings, a sliding ring is slidably provided on the guide rails of the flange connecting rings, a second spring is provided between the sliding ring and the flange connecting ring, and a rotating frame is rotatably installed on the sliding ring. The rotating frame is used to limit the bolt assembly on the flange connecting ring. Under the action of the second spring, the rotating frame can apply elastic force toward the bolt assembly, thereby improving the stability of the bolt assembly between the two flange connecting rings.

[0009] In one embodiment, the flange connection rings are detachably installed at the inlet of the automobile fuel tank and the oil outlet of the refueling pipe. The flange connection rings can be removed and replaced as needed to facilitate maintenance of the flange connection rings, thereby extending the service life of the two flange connection rings.

[0010] In one embodiment, a limit head is provided on the circumferential extension of the rotating frame, and the number of the limit heads is consistent with the number of the bolt assemblies of the flange connecting ring. A groove that matches the inner part of the bolt assembly is opened in the limit head of the rotating frame. By screwing the rotating frame on the sliding ring, the limit heads on the rotating frame are aligned with the bolt assemblies. Under the action of the second spring, the rotating frame can be stably limited on the bolt assemblies on the outer sides of the two flange connecting rings, thereby preventing the bolt assemblies from loosening after long-term use, thereby further improving the connection stability of the refueling pipe.

[0011] The beneficial effects are: 1. The utility model sets a first sealing gasket at the fuel filling port to seal the outside of the fuel filling port to prevent fuel leakage from the outside. The second sealing gasket is set inside the oil cap to ensure that the second sealing gasket fits tightly with the fuel filling port after the oil cap is tightened to further improve the sealing performance. At the same time, the third sealing gasket and the fourth sealing gasket are set between the butt joints of the two flange connecting rings to further improve the sealing performance after the two flange connecting rings are butt jointed. The multi-level sealing design works together to ensure the sealing performance of the fuel filler pipe.

[0012] 2. The utility model can stably dock and install the two flange connecting rings through the bolt assembly to ensure the firmness of the connection. The gasket is arranged between the bolt assembly and the flange connecting ring to increase the stability of the bolt assembly connection. In addition, through the sliding ring, the second spring and the rotating frame, the limit head on the rotating frame can be stably limited on the bolt assembly to prevent the bolt assembly from loosening after long-term use, thereby further improving the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 This is a diagram showing the connection relationship between the fuel filling pipe, fuel filling port and first sealing gasket of the utility model.

[0015] Figure 3This is a schematic diagram of the matching relationship among the oil cover, second sealing gasket, guide sleeve and sliding rod of the utility model.

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the two flange connection rings after being butt-jointed in the present invention.

[0017] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model after the two flange connection rings are separated.

[0018] Figure 6 This is a diagram showing the connection relationship among the guide rail, sliding ring, rotating frame and other components of the utility model.

[0019] Markings in the figure are: 1-fuel pipe, 2-oil filling port, 21-oil outlet, 3-first sealing gasket, 4-oil cover, 5-second sealing gasket, 6-guide sleeve, 7-slide rod, 8-first spring, 9-flange connecting ring, 10-bolt assembly, 101-gasket, 11-placement groove, 12-third sealing gasket, 13-fourth sealing gasket, 14-guide rail, 15-sliding ring, 16-second spring, 17-rotating frame. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0021] Embodiment: A car refueling pipe with good sealing performance, such as Figure 1-Figure 5As shown, it includes a fuel filling pipe 1, one end of the fuel filling pipe 1 is a fuel filling port 2 for adding gasoline, and the other end of the fuel filling pipe 1 is a fuel outlet 21, which is a docking port for the automobile fuel tank; it also includes: a first sealing gasket 3, which is arranged at the fuel filling port 2 end of the fuel filling pipe 1, and the first sealing gasket 3 is used to seal the outside of the fuel filling port 2; an oil cap 4, which is installed at the end of the fuel filling port 2 through a thread; a second sealing gasket 5, which is arranged inside the oil cap 4, and the second sealing gasket 5 is used to improve the sealing between the oil cap 4 and the fuel filling pipe 1, and between the oil cap 4 and the second sealing gasket 5 A pressing piece is provided, which acts on the second sealing gasket 5 so that the second sealing gasket 5 can be sealed inside the oil cap 4; a flange connecting ring 9 is provided as two butted together, one of which is provided at the inlet of the automobile fuel tank, and the other is provided at the oil outlet 21 of the filler pipe 1; a bolt assembly 10, the two flange connecting rings 9 are stably butted together by the bolt assembly 10; a gasket 101 is provided between the bolt assembly 10 and the flange connecting ring 9, and the gasket 101 is used to increase the connection of the bolt assembly 10 Stability; The fourth sealing gasket 13 is arranged at the inner tube wall of the two flange connection rings 9. The fourth sealing gasket 13 is used to improve the sealing of the inner ring of the two flange connection rings 9 at the butt joint. After unscrewing the oil cap 4 at the oil filling port 2 of the refueling pipe 1, refueling can be conveniently performed. After screwing the oil cap 4 back to the oil filling port 2, the use of the first sealing gasket 3 and the second sealing gasket 5 is utilized to keep the oil filling port 2 and the oil cap 4 in good sealing condition. At the same time, the oil outlet 21 is conveniently flange-connected and installed through the two flange connection rings 9 in conjunction with the bolt assembly 10, and the fourth sealing gasket is used. The gasket 13 is used to improve the sealing between the fuel filler pipe 1 and the fuel tank; the pressing part includes: a guide sleeve 6, which is provided with multiple and circumferentially arranged on the inner wall of the oil cover 4; a slide rod 7, which is slidably connected in each guide sleeve 6, and one end of the slide rod 7 is fixed to the second sealing gasket 5; a first spring 8 is provided between the guide sleeve 6 and the slide rod 7, and the first spring 8 acts on the second sealing gasket 5 through the slide rod 7. When the oil cover 4 is screwed on the fuel filling port 2 of the fuel filler pipe 1, the second sealing gasket 5 can be tightly attached to the fuel filling port 2 of the fuel filler pipe 1, thereby improving the sealing between the oil cover 4 and the fuel filler pipe 1.

[0022] like Figure 5 As shown, an annular placement groove 11 is provided at the inner ring of one side of the flange connection ring 9, and a third sealing gasket 12 is provided in the placement groove 11 of the flange connection ring 9. The third sealing gasket 12 is used to further improve the sealing performance of the two flange connection rings 9 after the connection; the flange connection rings 9 are all detachably installed at the inlet of the automobile tank and the oil outlet 21 of the refueling pipe 1. The flange connection rings 9 can be disassembled and replaced as needed to facilitate maintenance of the flange connection rings 9, thereby extending the service life between the two flange connection rings 9.

[0023] like Figure 5 and Figure 6As shown, guide rails 14 are provided on the outer walls of the two flange connection rings 9, a sliding ring 15 is slidably provided on the guide rails 14 of the flange connection ring 9, a second spring 16 is provided between the sliding ring 15 and the flange connection ring 9, and a rotating frame 17 is rotatably installed on the sliding ring 15. The rotating frame 17 is used to limit the bolt assembly 10 on the flange connection ring 9. Under the action of the second spring 16, the rotating frame 17 can apply elastic force toward the bolt assembly 10, thereby improving the stability of the bolt assembly 10 between the two flange connection rings 9.

[0024] like Figure 4-Figure 6 As shown, a limiting head is provided on the circumferential extension of the rotating frame 17, and the number of the limiting heads is consistent with the number of the bolt assemblies 10 of the flange connection ring 9. A groove matching the inner portion of the bolt assembly 10 is provided in the limiting head of the rotating frame 17. By screwing the rotating frame 17 on the sliding ring 15, the limiting heads on the rotating frame 17 are aligned with the bolt assemblies 10. Under the action of the second spring 16, the rotating frame 17 can be stably limited on the bolt assemblies 10 on the outside of the two flange connection rings 9, thereby preventing the bolt assemblies 10 from loosening after long-term use, thereby further improving the connection stability of the refueling pipe 1.

[0025] When the oil cap 4 is tightened, the first spring 8 makes the second sealing gasket 5 fit tightly against the inner wall of the oil filling port 2 of the fuel filler pipe 1 through the force of the sliding rod 7, ensuring good sealing between the oil cap 4 and the fuel filling port 2. In addition, since a first sealing gasket 3 is provided at the end of the fuel filling port 2, it is used to enhance the sealing effect of the outer side of the fuel filling port 2 to prevent fuel leakage. At the oil outlet 21 at the other end of the fuel filler pipe 1, two flange connecting rings 9 are connected through a flange structure to achieve a stable connection between the fuel filler pipe 1 and the automobile fuel tank. One of them is installed at the inlet of the automobile fuel tank, and the other is installed at the oil outlet 21 of the fuel filler pipe 1. The two flange connecting rings 9 are tightly connected by a bolt assembly 10, and a gasket 101 is provided therebetween to increase the stability of the connection. In order to further improve the sealing, an annular placement groove 11 is provided at the inner ring of the docking surface of the flange connecting ring 9, and a third The sealing gasket 12 cooperates with the fourth sealing gasket 13 inside the two flange connection rings 9 to provide double-layer sealing protection for the flange connection rings 9 when they are docked. In addition, in order to ensure the long-term stability and reliability of the connection between the flange connection rings 9, a sliding ring 15 is provided on the outer wall of the flange connection ring 9, and a second spring 16 is provided between the sliding ring 15 and the flange connection ring 9. A rotating frame 17 with multiple limit heads is also rotatably installed on the sliding ring 15. After the two flange connection rings 9 are connected by the bolt assembly 10, the limit head on the rotating frame 17 can be aligned with the position of the bolt assembly 10 by rotating the sliding ring 15. Under the action of the second spring 16, the rotating frame 17 can apply a certain buffer pressure to the bolt assembly 10 to prevent the bolt assembly 10 from loosening due to long-term use, thereby ensuring the stability of the connection between the refueling pipe 1 and the fuel tank and improving the service life of the two flange connections.

[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A car refueling pipe with good sealing performance, comprising a refueling pipe (1), one end of the refueling pipe (1) being a fuel filling port (2) for adding gasoline, and the other end of the refueling pipe (1) being an oil outlet (21), and the oil outlet (21) being a docking port for a car fuel tank; It is characterized in that Also includes: A first sealing gasket (3) is provided at the end of the oil filling port (2) of the oil filling pipe (1), and the first sealing gasket (3) is used to seal the outer side of the oil filling port (2); An oil cap (4) is installed at the end of the oil filling port (2) through a thread; a second sealing gasket (5) disposed inside the oil cap (4), the second sealing gasket (5) being used to improve the sealing performance between the oil cap (4) and the oil filling pipe (1), and a pressing member being provided between the oil cap (4) and the second sealing gasket (5); Two flange connection rings (9) are provided to be connected to each other, wherein one flange connection ring (9) is provided at the inlet of the automobile fuel tank, and the other flange connection ring (9) is provided at the oil outlet (21) of the fuel filling pipe (1); Bolt assembly (10), the flange connection rings (9) at the two locations are stably docked and installed through the bolt assembly (10); A gasket (101) is provided between the bolt assembly (10) and the flange connection ring (9); The fourth sealing gasket (13) is arranged on the inner pipe wall of the two flange connection rings (9), and the fourth sealing gasket (13) is used to improve the sealing performance of the inner ring at the joint of the two flange connection rings (9).

2. The automobile fuel filler pipe with good sealing performance as claimed in claim 1, characterized in that: The pressing member comprises: A plurality of guide sleeves (6) are provided and circumferentially arranged on the inner wall of the oil cover (4); A sliding rod (7) is slidably connected to each guide sleeve (6), and one end of the sliding rod (7) is fixed to the second sealing gasket (5); A first spring (8) is arranged between the guide sleeve (6) and the slide rod (7), and the first spring (8) acts on the second sealing gasket (5) through the slide rod (7).

3. The automobile fuel filler pipe with good sealing performance as claimed in claim 2, characterized in that: An annular placement groove (11) is provided at the inner ring of one side of the flange connection ring (9), and a third sealing gasket (12) is provided in the placement groove (11) of the flange connection ring (9).

4. The automobile fuel filler pipe with good sealing performance as claimed in claim 3, characterized in that: Guide rails (14) are provided on the outer walls of the two flange connection rings (9), a sliding ring (15) is slidably provided on the guide rails (14) of the flange connection rings (9), a second spring (16) is provided between the sliding ring (15) and the flange connection ring (9), a rotating frame (17) is rotatably installed on the sliding ring (15), and the rotating frame (17) is used to limit the bolt assembly (10) on the flange connection ring (9).

5. The automobile fuel filler pipe with good sealing performance as claimed in claim 4, characterized in that: The flange connection rings (9) are detachably mounted at the inlet of the automobile fuel tank and the oil outlet (21) of the fuel filling pipe (1), and the flange connection rings (9) can be disassembled and replaced as needed.

6. The automobile fuel filler pipe with good sealing performance as claimed in claim 5, characterized in that: The rotating frame (17) is provided with a circumferentially extending limiting head, the number of which is consistent with the number of the bolt assemblies (10) of the flange connection ring (9), and a groove matching the inner portion of the bolt assembly (10) is provided in the limiting head of the rotating frame (17).

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