A rubber seal for an oil tank

Abstract

The utility model belongs to the technical field of oil tank sealing, and disclose a rubber sealing element for oil tank, including sealing assembly, sealing assembly fixed mounting is in the oil tank mouth outer surface, sealing assembly movable sleeve is equipped in the outside of oil tank cover connecting shaft, the outside fixed connection of sealing assembly has cleaning assembly, the side fixed connection of sealing assembly has the support ring of being located in the bottom of cleaning assembly, sealing assembly is by the compression ring, first connecting ring and sealing ring, the compression ring, sealing ring, first connecting ring and support ring are connected in head and tail, form the closed space. The utility model is because the setting of sealing ring, under the cooperation of compression ring, first connecting ring and support ring, can form sealed cavity, and because the hardness of support ring is greater than sealing ring makes the compression sealing ring to expand inwards and the shaft between oil tank cover and lower end thread connection is closely attached, avoids the situation that oil body is exuded from the thread connection gap during the shaking of rapid operation.

Description

Technical Field

[0001] This utility model belongs to the field of fuel tank sealing technology, specifically a rubber sealing component for fuel tanks. Background Technology

[0002] The motorcycle fuel tank is an important component of a motorcycle. Poor sealing of the fuel tank will cause leakage, which can seriously endanger driving safety and may even cause traffic accidents. After the fuel tank is full, it needs to be sealed with a fuel tank cap to prevent leakage. Usually, a sealing ring is installed on the fuel tank cap.

[0003] Utility model patent application number 202322538598.7 discloses a sealing structure for a motorcycle fuel tank cap. This structure uses a detachable sealing mechanism to achieve a sealed connection between the fuel tank cap and the fuel tank, preventing fuel leakage due to shaking during high-speed driving. However, because the detachable structure is a movable sleeve between the cap and the barrier post, gaps cannot be avoided. This allows fuel to still seep to the top or bottom of the detachable sealing mechanism. Consequently, when the fuel tank cap is opened, the top and bottom of the seal become covered in fuel when in contact with air, easily attracting dust. Especially when connected to the fuel tank cap, removing the cap leaves the fuel tank opening bare, allowing dripping fuel to fall onto the top of the tank. This not only easily accumulates dust, making the fuel tank opening dirty and difficult to seal, but also affects the driver's comfort. Therefore, it is necessary to develop a rubber seal for the fuel tank to address the shortcomings of the existing technology. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a rubber seal for fuel tanks, which has the advantages of good sealing performance and is not prone to dust adhesion.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rubber seal for an oil tank, comprising a sealing assembly, wherein the sealing assembly is fixedly installed on the outer surface of the oil tank opening, the sealing assembly is movably sleeved on the outside of the oil tank cover connecting shaft, a cleaning assembly is fixedly connected to the outer side of the sealing assembly, and a support ring located at the bottom of the cleaning assembly is fixedly connected to the side of the sealing assembly. The sealing assembly consists of a pressure ring, a first connecting ring, and a sealing ring. The pressure ring, sealing ring, first connecting ring, and support ring are connected end to end to form a sealed space. The pressure ring and the first connecting ring are rigid structures, while the sealing ring and the support ring are elastic structures. The hardness coefficient of the support ring is greater than that of the sealing ring. The outer surfaces of the pressure ring and the sealing ring are smooth, and the inner diameter of the sealing ring is greater than the outer diameter of the oil tank cap connecting shaft.

[0006] Preferably, the top of the pressure ring is provided with several reflux grooves, and the horizontal plane of the middle part of the reflux groove is higher than the horizontal plane of its two ends.

[0007] Preferably, two adjacent reflux channels are interconnected, the inner wall of the reflux channel is smooth, and the lower end of the reflux channel passes through the pressure ring and above the sealing ring, extending to directly above the oil tank opening.

[0008] Preferably, the pressure ring is inclined, with the horizontal plane of the end of the pressure ring away from the sealing ring located above the horizontal plane of the end of the pressure ring closer to the sealing ring, and the outer side of the end of the pressure ring away from the sealing ring is fixedly sleeved inside the cleaning assembly.

[0009] Preferably, the support ring has a curved structure, with the upper end of the support ring integrally formed at the bottom of the pressure ring away from the sealing ring, and the lower end of the support ring integrally formed at the top of the first connecting ring away from the sealing ring. The distance between the upper and lower ends of the support ring and the sealing ring is less than the distance between the middle of the support ring and the sealing ring.

[0010] Preferably, the cleaning assembly includes a cleaning plate disposed on the outside of the support ring, the cleaning plate being inclined, and the outer surface of the cleaning plate being provided with a dustproof surface, the outer surface of the dustproof surface being smooth.

[0011] Preferably, the upper end of the cleaning plate is integrally formed with a second connecting ring, the upper end of the second connecting ring is integrally formed at the end of the pressure ring away from the sealing ring, the outer surface of the second connecting ring is a smooth arc surface structure, and the outer surface of the pressure ring is smoothly connected to the dustproof surface through the second connecting ring.

[0012] Preferably, the lower end of the cleaning plate is integrally formed with a drag-reducing ring. The distance between the bottom of the drag-reducing ring and the top of the second connecting ring is greater than the distance between the back sides of the pressure ring and the first connecting ring away from the sealing ring. The side of the bottom of the drag-reducing ring away from the support ring is a pointed tip and abuts against the outer surface of the oil tank opening. The side of the bottom of the drag-reducing ring near the support ring is a smooth arc surface and forms an angle with the outer surface of the oil tank opening.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Due to the setting of the sealing ring, the present invention can form a sealed cavity with the cooperation of the pressure ring, the first connecting ring and the support ring. Furthermore, since the hardness of the support ring is greater than that of the sealing ring, the sealing ring expands inward after compression and fits tightly with the shaft between the oil tank cover and the lower threaded connection, thus avoiding the situation where oil seeps out from the threaded connection gap due to shaking during rapid operation.

[0014] 2. Due to the design of the return groove, this utility model ensures that after the threaded connection oil tank cover is removed, since the lower end is directly inserted into the oil tank, it is inevitable that oil will be contaminated when shaking. After removal, oil will usually drip onto the outer surface of the oil tank. At this time, the oil that falls onto the pressure ring can flow back into the oil tank along the return groove.

[0015] 3. Due to the cleaning plate, when the oil tank cap is tightened, the second connecting ring will be squeezed, which will push the cleaning plate down and make its bottom drag-reducing ring slide along the outer surface of the oil tank, thereby scraping off and pushing the dust and other dust on the surface of the oil tank away from the oil tank opening.

[0016] 4. Due to the dustproof surface of this utility model, with the cooperation of the second connecting ring, the dust falling on its surface can slide away from the oil tank opening and fall to the outside of the drag-reducing ring on the outer surface of the oil tank. So that when the oil tank cap is tightened next time, the drag-reducing ring can push it further away and prevent it from entering the oil tank opening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is a front view of the present invention; Figure 4 This is a sectional view of the front of the present invention; Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0018] In the diagram: 1. Sealing assembly; 11. Pressure ring; 12. First connecting ring; 13. Sealing ring; 2. Cleaning assembly; 21. Cleaning plate; 22. Dustproof surface; 23. Second connecting ring; 24. Resistance reducing ring; 3. Return groove; 4. Support ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 5As shown, this utility model provides a rubber seal for a fuel tank, including a sealing component 1. The sealing component 1 is fixedly installed on the outer surface of the fuel tank opening. The sealing component 1 is movably sleeved on the outside of the fuel tank cover connecting shaft. A cleaning component 2 is fixedly connected to the outside of the sealing component 1. A support ring 4 located at the bottom of the cleaning component 2 is fixedly connected to the side of the sealing component 1. The sealing assembly 1 consists of a pressure ring 11, a first connecting ring 12, and a sealing ring 13. The pressure ring 11, sealing ring 13, first connecting ring 12, and support ring 4 are connected end to end to form a sealed space. The pressure ring 11 and first connecting ring 12 are rigid structures, while the sealing ring 13 and support ring 4 are elastic structures. The hardness coefficient of the support ring 4 is greater than that of the sealing ring 13. The outer surfaces of the pressure ring 11 and sealing ring 13 are smooth, and the inner diameter of the sealing ring 13 is larger than the outer diameter of the connecting shaft of the oil tank cover. Due to the setting of the sealing ring 13, with the cooperation of the pressure ring 11, first connecting ring 12, and support ring 4, a sealed cavity can be formed. Furthermore, because the hardness of the support ring 4 is greater than that of the sealing ring 13, the sealing ring 13 expands inward after compression and fits tightly against the shaft between the oil tank cover and the lower threaded connection, preventing oil from seeping out from the threaded connection gap due to shaking during rapid operation.

[0021] The pressure ring 11 has several return grooves 3 on its top, and the horizontal plane of the middle part of the return groove 3 is higher than the horizontal plane of its two ends.

[0022] The two adjacent return channels 3 are interconnected. The inner wall of the return channel 3 is smooth. The lower end of the return channel 3 passes through the pressure ring 11 and passes above the sealing ring 13, extending to the top of the oil tank opening. Due to the setting of the return channel 3, after the threaded connection oil tank cover is removed, since the lower end is directly inserted into the oil tank, it is inevitable that oil will be contaminated when shaking. After removal, oil will usually drip onto the outer surface of the oil tank. At this time, the oil that falls onto the pressure ring 11 can flow back into the oil tank along the return channel 3.

[0023] The pressure ring 11 is inclined, with the horizontal plane of the end of the pressure ring 11 away from the sealing ring 13 located above the horizontal plane of the end of the pressure ring 11 close to the sealing ring 13. The outer side of the end of the pressure ring 11 away from the sealing ring 13 is fixedly sleeved inside the cleaning assembly 2.

[0024] The support ring 4 has a curved structure. The upper end of the support ring 4 is integrally formed at the bottom of the pressure ring 11 at the end away from the sealing ring 13, and the lower end of the support ring 4 is integrally formed at the top of the first connecting ring 12 at the end away from the sealing ring 13. The distance between the upper and lower ends of the support ring 4 and the sealing ring 13 is less than the distance between the middle part of the support ring 4 and the sealing ring 13.

[0025] The cleaning component 2 includes a cleaning plate 21 disposed on the outside of the support ring 4. The cleaning plate 21 is inclined and has a dustproof surface 22 on its outer surface. The outer surface of the dustproof surface 22 is smooth. Due to the dustproof surface 22, with the cooperation of the second connecting ring 23, the dust falling on its surface can slide away from the fuel tank opening and fall to the outside of the drag-reducing ring 24 on the outer surface of the fuel tank. So that when the fuel tank cap is tightened next time, the drag-reducing ring 24 can push it further away and place it into the fuel tank opening.

[0026] The upper end of the cleaning plate 21 is integrally formed with a second connecting ring 23. The upper end of the second connecting ring 23 is integrally formed at the end of the pressure ring 11 away from the sealing ring 13. The outer surface of the second connecting ring 23 is a smooth arc surface structure. The outer surface of the pressure ring 11 is smoothly connected to the dustproof surface 22 through the second connecting ring 23.

[0027] The cleaning plate 21 has an integrally formed drag-reducing ring 24 at its lower end. The distance between the bottom of the drag-reducing ring 24 and the top of the second connecting ring 23 is greater than the distance between the back sides of the pressure ring 11 and the first connecting ring 12 away from the sealing ring 13. The bottom of the drag-reducing ring 24 is pointed on the side away from the support ring 4 and abuts against the outer surface of the tank opening. The bottom of the drag-reducing ring 24 is smooth arc surface on the side close to the support ring 4 and forms an angle with the outer surface of the tank opening. Due to the setting of the drag-reducing ring 24, when the tank cap is tightened, the second connecting ring 23 will be squeezed, thereby pushing the cleaning plate 21 down and causing the bottom drag-reducing ring 24 to slide along the outer surface of the tank, thereby scraping and pushing the dust and other dust on the surface of the tank away from the tank opening.

[0028] Working principle and usage process of this utility model: It is placed between the fuel tank opening and the fuel tank cap. When the fuel tank cap is tightened with bolts, as the fuel tank cap gradually approaches the fuel tank opening, it will contact the second connecting ring 23 and gradually increase the compressive force. As the distance between the fuel tank cap and the fuel tank opening decreases, the fuel tank cap will squeeze the device through the second connecting ring 23 and the pressure ring 11, thereby pushing the cleaning plate 21 to slide along the outer surface of the fuel tank opening through the resistance reducing ring 24, scraping and pushing the dust near the outer surface of the fuel tank opening away from the fuel tank opening; and with the cooperation of the first connecting ring 12, it is squeezed... When the pressure ring 11 is pressed, the air between the support ring 4, the pressure ring 11, the first connecting ring 12, and the sealing ring 13 is compressed. Under the compression of the air inside the outer side, the sealing ring 13 expands inward, causing the inner diameter of its outer surface to gradually decrease until its inner side is in contact with the outer surface of the shaft between the threaded connection of the oil tank cover and the cover body. If the oil tank cover continues to tighten at this time, the further compressed air will push the support ring 4 outward, causing the support ring 4 to expand outward. This ensures that after the sealing ring 13 is in contact, the oil tank cover can continue to move down to ensure that it is completely tightened.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rubber seal for a fuel tank, comprising a sealing assembly (1), characterized in that: The sealing assembly (1) is fixedly installed on the outer surface of the oil tank opening. The sealing assembly (1) is movably sleeved on the outside of the oil tank cover connecting shaft. A cleaning assembly (2) is fixedly connected to the outside of the sealing assembly (1). A support ring (4) located at the bottom of the cleaning assembly (2) is fixedly connected to the side of the sealing assembly (1). The sealing assembly (1) consists of a pressure ring (11), a first connecting ring (12), and a sealing ring (13). The pressure ring (11), the sealing ring (13), the first connecting ring (12), and the support ring (4) are connected end to end to form a sealed space. The pressure ring (11) and the first connecting ring (12) are rigid structures, while the sealing ring (13) and the support ring (4) are elastic structures. The hardness coefficient of the support ring (4) is greater than that of the sealing ring (13). The outer surfaces of the pressure ring (11) and the sealing ring (13) are smooth, and the inner diameter of the sealing ring (13) is greater than the outer diameter of the oil tank cover connecting shaft.

2. The rubber seal for a fuel tank according to claim 1, characterized in that: The top of the pressure ring (11) is provided with several return grooves (3), and the horizontal plane of the middle part of the return groove (3) is higher than the horizontal plane of its two ends.

3. A rubber seal for a fuel tank according to claim 2, characterized in that: The two adjacent return channels (3) are connected to each other. The inner wall of the return channel (3) is smooth. The lower end of the return channel (3) passes through the pressure ring (11) and passes above the sealing ring (13), extending to the top of the oil tank opening.

4. A rubber seal for a fuel tank according to claim 1, characterized in that: The pressure ring (11) is inclined. The horizontal plane of the end of the pressure ring (11) away from the sealing ring (13) is located above the horizontal plane of the end of the pressure ring (13) close to the sealing ring (13). The outer side of the end of the pressure ring (11) away from the sealing ring (13) is fixedly sleeved inside the cleaning assembly (2).

5. A rubber seal for a fuel tank according to claim 1, characterized in that: The support ring (4) is a curved structure. The upper end of the support ring (4) is integrally formed at the bottom of the end of the pressure ring (11) away from the sealing ring (13). The lower end of the support ring (4) is integrally formed at the top of the end of the first connecting ring (12) away from the sealing ring (13). The distance between the upper and lower ends of the support ring (4) and the sealing ring (13) is less than the distance between the middle part of the support ring (4) and the sealing ring (13).

6. A rubber seal for a fuel tank according to claim 1, characterized in that: The cleaning component (2) includes a cleaning plate (21) disposed on the outside of the support ring (4). The cleaning plate (21) is inclined and the outer surface of the cleaning plate (21) is provided with a dustproof surface (22). The outer surface of the dustproof surface (22) is smooth.

7. A rubber seal for a fuel tank according to claim 6, characterized in that: The upper end of the cleaning plate (21) is integrally formed with a second connecting ring (23). The upper end of the second connecting ring (23) is integrally formed at the end of the pressure ring (11) away from the sealing ring (13). The outer surface of the second connecting ring (23) is a smooth arc surface structure. The outer surface of the pressure ring (11) is smoothly connected to the dustproof surface (22) through the second connecting ring (23).

8. A rubber seal for a fuel tank according to claim 7, characterized in that: The lower end of the cleaning plate (21) is integrally formed with a drag-reducing ring (24). The distance between the bottom of the drag-reducing ring (24) and the top of the second connecting ring (23) is greater than the distance between the back sides of the pressure ring (11) and the first connecting ring (12) away from the sealing ring (13). The bottom of the drag-reducing ring (24) is pointed on the side away from the support ring (4) and abuts against the outer surface of the oil tank opening. The bottom of the drag-reducing ring (24) is smooth arc surface on the side close to the support ring (4) and forms an angle with the outer surface of the oil tank opening.

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