Motorcycle fuel tank lock and motorcycle

Abstract

The application discloses a motorcycle fuel tank lock and a motorcycle, and relates to the field of motorcycle fuel tank locks, which comprises a lock seat and a fuel tank cover, wherein the lock seat is integrated with a fuel evaporation element and a fuel overflow element, the fuel evaporation element is provided with a fuel evaporation pipe interface for connecting a fuel evaporation pipe, and the fuel overflow element is provided with a fuel overflow pipe interface for connecting a fuel overflow pipe. The application adopts the structure that the fuel evaporation element and the fuel overflow element are integrated on the lock seat, and the relative positions of the fuel evaporation pipe interface and the fuel overflow pipe interface on the circumference of the lock seat are adjustable. The application not only solves the problems of dispersed welding, large welding deformation and poor adaptability to multiple vehicle models of the existing fuel tank functional elements, realizes the integration of overflow, fuel evaporation, wave prevention and locking sealing functions, simplifies the fuel tank processing procedure, reduces the mold development and welding costs, improves the sealing reliability between the fuel tank lock and the fuel tank, is compatible with multiple fuel tank pipeline layout schemes, and takes into account the lightweight structure, assembly precision and vehicle adaptability.

Description

Technical Field

[0001] This invention relates to the field of motorcycle fuel supply, and more particularly to a motorcycle fuel tank lock and a motorcycle. Background Technology

[0002] As a crucial component of a motorcycle's fuel supply system, the fuel tank lock performs multiple functions, including opening the fuel tank for refueling, closing it to prevent fuel theft, and sealing it to prevent fuel evaporation. It also serves as a decorative cover for the fuel tank surface. Its structural design directly impacts the motorcycle's ease of use, safety, and manufacturing costs. With the increasing trend towards lightweight and integrated motorcycles, and the increasingly stringent environmental regulations on fuel evaporation emissions, higher demands are placed on the simplification of fuel tank lock structures, functional integration, and sealing reliability. This has driven the development of motorcycle fuel tank lock structures.

[0003] Existing motorcycle fuel tank locks primarily involve attaching the lock to the fuel tank filler neck. The components on the fuel tank used for mounting the lock are mostly connected by welding. Specifically, the fuel tank neck typically requires welding multiple parts, including the filler neck, lock bracket, overflow pipe, fuel evaporation pipe, and anti-slip ring. These parts are first welded into an assembly and then welded to the upper casing of the fuel tank. However, this method often has several drawbacks, such as the large number of parts requiring multiple molds, the complex welding process for the filler neck, and the significant cumulative deformation resulting from welding multiple parts into an assembly before welding to the upper casing, which can compromise the safety of the fuel tank lock assembly. The installation position error is uncontrollable, the process is complex, and the manufacturing cost is high; the fuel tank's oil vapor recovery device and overflow structure require separate welding of overflow pipe and fuel evaporation pipe (usually made of copper) at the fuel filler port, which pass through the inside of the fuel tank and then out through the lower shell of the fuel tank. The welding process for different materials is highly demanding and there is a risk of oil leakage; the fuel tank lock limit boss and lock tongue are two independent parts of the fuel tank and the fuel tank lock, respectively. After assembly, the circumferential gap and axial height difference of the fuel tank decorative cover are inconsistent, resulting in low appearance assembly accuracy; in addition, the fuel tank lock body is composed of multiple metal parts, which are assembled after die casting, resulting in large weight and high cost.

[0004] Therefore, it is necessary to improve the structure of existing motorcycle fuel tank locks. This would not only solve the problems of scattered welding of existing fuel tank functional components, large welding deformation, and poor compatibility with various models, but also achieve integrated functions of overflow, fuel evaporation, wave prevention, and locking sealing. At the same time, the use of composite materials would achieve structural lightweighting, simplify fuel tank processing procedures, reduce mold development and welding costs, improve the sealing reliability between the fuel tank lock and the fuel tank, and be compatible with various fuel tank pipeline layout schemes. This would balance structural lightweighting, assembly precision, and vehicle compatibility, reduce the overall vehicle weight and component costs, and improve fuel safety and long-term stability of the lock body. Summary of the Invention

[0005] In view of the shortcomings of current motorcycle fuel tank lock structures, the purpose of this invention is to provide a motorcycle fuel tank lock and motorcycle that not only solves the problems of scattered welding of existing fuel tank functional components, large welding deformation, and poor compatibility with multiple vehicle models, but also integrates overflow, fuel evaporation, anti-surge, and locking sealing functions into one integrated system. Furthermore, it utilizes composite materials to achieve lightweight structure, simplify fuel tank processing procedures, reduce mold development and welding costs, improve the sealing reliability between the fuel tank lock and the fuel tank, and is compatible with various fuel tank piping layout schemes. It balances lightweight structure, assembly precision, and vehicle compatibility, reducing overall vehicle weight and component costs, and improving fuel safety and long-term stability of the lock body.

[0006] The present invention provides a motorcycle fuel tank lock, comprising a lock base and a fuel tank cover. The lock base integrates a fuel evaporation element and a fuel overflow element. The fuel evaporation element has a fuel evaporation pipe interface for connecting to a fuel evaporation pipe, and the fuel overflow element has a fuel overflow pipe interface for connecting to a fuel overflow pipe.

[0007] Furthermore, the relative positions of the fuel evaporation pipe interface and the fuel overflow pipe interface in the circumferential direction of the lock seat are adjustable.

[0008] Furthermore, the fuel evaporation component includes a vent valve and a fuel evaporation pipe connector. The first end of the fuel evaporation pipe connector is fixedly connected to and communicates with the vent valve, and the second end forms the fuel evaporation pipe interface.

[0009] Furthermore, the fuel overflow component includes a fuel overflow pipe connector, the first end of which is fixedly connected to and communicates with the lock seat, and the second end forms the fuel overflow pipe interface.

[0010] Furthermore, the lock seat includes a lock tube extending downward along the axial direction and an annular seat body formed along the circumferential direction of the lock tube. The outer side wall of the annular seat body is evenly provided with a plurality of vent valve mounting slots along the circumferential direction. The vent valve can be selectively installed in the vent valve mounting slot, so that the relative position of the fuel evaporation pipe interface and the fuel overflow pipe interface in the circumferential direction of the lock seat is adjustable.

[0011] Furthermore, the outer wall of the annular seat between adjacent vent valve mounting slots extends outward in the horizontal direction to form a mounting strip for mounting the lock seat to the filler neck of the fuel tank.

[0012] Furthermore, the length of the vent valve mounting groove is not less than the length of the vent valve, and the ratio of the length of the vent valve mounting groove to the length of the mounting strip is 2 / 3-3 / 4;

[0013] The ratio of the depth of the vent valve mounting groove to the length of the outer wall of the annular seat is 1 / 3 to 1 / 2.

[0014] Furthermore, when the lock seat is installed at the filler neck of the fuel tank, the lock tube extends into the filler neck by a set distance;

[0015] It also includes a sealing gasket, and a sealing groove is provided on the lower surface of the annular seat. The sealing gasket is embedded in the sealing groove and forms a seal with the mounting surface of the oil filler port.

[0016] The lock seat, vent valve, and fuel tank cover are all made of nylon-glass fiber composite material.

[0017] Furthermore, the edge of the filler neck forms a smooth transition plane with the fuel tank body.

[0018] The motorcycle of the present invention includes the aforementioned motorcycle fuel tank lock.

[0019] The beneficial effects of this invention are as follows: This invention provides a motorcycle fuel tank lock and a motorcycle, which integrates a fuel evaporation component and a fuel overflow component on the lock seat. The relative positions of the fuel evaporation pipe interface and the fuel overflow pipe interface in the circumferential direction of the lock seat are adjustable. This not only solves the problems of scattered welding of existing fuel tank functional components, large welding deformation, and poor compatibility with multiple vehicle models, but also achieves integrated overflow, fuel evaporation, anti-surge, and locking sealing functions. At the same time, the use of composite materials achieves structural lightweighting, simplifies fuel tank processing procedures, reduces mold development and welding costs, improves the sealing reliability between the fuel tank lock and the fuel tank, and is compatible with various fuel tank pipeline layout schemes. It balances structural lightweighting, assembly precision, and vehicle compatibility, reduces the overall vehicle weight and component costs, and improves fuel safety and long-term stability of the lock body. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the structure of the motorcycle fuel tank lock of the present invention. Figure I ;

[0022] Figure 2 Schematic diagram of a motorcycle fuel tank lock Figure II ;

[0023] Figure 3 An exploded view of a motorcycle fuel tank lock;

[0024] Figure 4 A schematic diagram showing the connection between the motorcycle fuel tank lock and the fuel filler neck.

[0025] Figure 5 This is a schematic diagram showing the connection between the fuel tank cap connector and the lock body.

[0026] Reference numerals: 1. Fuel tank cap; 101. Hinge joint; 102. Protective plate; 2. Fuel tank; 201. Filler neck; 3. Fuel evaporator pipe interface; 4. Fuel overflow pipe interface; 5. Lock seat; 501. Lock pipe; 502. Annular seat; 503. Vent valve mounting groove; 504. Sealing groove; 505. Mounting strip; 6. Fuel tank cap connector; 601. Hinge lug; 602. Rotation limiting protrusion; 7. Vent valve; 8. Sealing gasket; 801. Sealing ring; 9. Lock housing; 901. Housing; 902. Bottom housing; 10. Lock tongue lever; 11. Lock cylinder; 12. Lock tongue; 1201. Rotation limiting groove; 13. Sealing gasket; 14. Sealing ring; 15. Fuel evaporator pipe interface; 16. Fuel overflow pipe interface. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0028] This invention discloses a motorcycle fuel tank lock, including a lock base 5 and a fuel tank cap 1. The lock base 5 integrates a fuel evaporation element and a fuel overflow element. The fuel evaporation element has a fuel evaporation pipe interface 3 for connecting to a fuel evaporation pipe, and the fuel overflow element has a fuel overflow pipe interface 4 for connecting to a fuel overflow pipe. The lock base 5 is integrally formed as an integrated base for the fuel evaporation element and the fuel overflow element, eliminating the need for a separate adapter base, significantly reducing the space occupied by the fuel tank opening, and adapting to the compact body structure of motorcycles. The fuel evaporation element has a fuel evaporation pipe interface 3, which can be directly connected to the vehicle's fuel evaporation pipeline. Fuel vapors volatilized in the fuel tank can be introduced into the recovery system through this interface, meeting the emission control requirements of China IV and China V motor vehicles and avoiding direct emission of oil and gas that pollutes the environment. The fuel overflow component features a fuel overflow pipe interface 4 for connecting to the fuel overflow line. When excessive fuel is added or the fuel level exceeds the safety threshold, the excess fuel can be diverted back through the fuel overflow pipe interface 4, preventing fuel spillage during vehicle movement and eliminating the safety hazards of fuel leakage or fire. The fuel evaporator and fuel overflow component are integrally molded with the lock seat 5, resulting in high structural strength and stable sealing performance. During assembly, the fuel circuit layout can be completed simply by plugging the two pipes into their corresponding interfaces, improving assembly efficiency and reducing the number of pipe joints, thus lowering the risk of leakage and balancing environmental protection, driving safety, and overall vehicle assembly. Convenience; Typically, the fuel tank cap 1 is also equipped with a protective plate 102, one end of which is hinged to the fuel tank cap 1 to protect the key slot, which is a conventional setting in the prior art; It also includes a lock body, which is usually installed on the inner surface of the fuel tank cap 1 and rotates synchronously with the fuel tank cap 1. The fuel tank cap 1 can rotate and open relative to the lock seat to realize the closing and opening of the fuel filler port 201. When the fuel tank cap 1 closes the fuel filler port 201, the lock body and the lock seat 5 mutually limit each other and restrict the rotation of the fuel tank cap 1 to realize the locking and anti-theft function, which is a conventional setting in the prior art and will not be described in detail here;

[0029] The lock body generally includes a lock shell 9, a latch lever 10, a lock cylinder 11, and a latch 12. The lock shell 9 is installed on the inner surface of the fuel tank cap 1. The lock cylinder 11 is located inside the lock shell 9. The latch 12 is located on one side of the lock shell 9 and can extend and retract radially along the lock shell 9 to lock with the fuel tank cap connector 6. The latch lever 10 is sleeved on the lock cylinder 11 and is driven to rotate by the lock cylinder 11, thereby driving the latch 12 to extend and retract radially. A return spring is also provided between the latch 12 and the lock shell 9, which is a conventional setting in the prior art. The lock shell 9 is usually composed of a shell 901 and a bottom shell 902. The functions of the fuel tank lock components, such as the fuel filler port, fuel tank lock bracket, fuel anti-sloshing ring, fuel tank lock mounting bushing, overflow pipe, fuel evaporation sealing bushing, and fuel evaporation pipe, are all integrated into the lock seat assembly and lock body. This simplifies the structure of the fuel tank filler port, reduces the probability of welding deformation of the fuel tank, and reduces the cost of parts molds. One end of the lock tongue 12 is provided with a rotation limiting groove 1201, and the inner edge of the fuel tank cover connector 6 is provided with a rotation limiting protrusion 602 radially inward. When the fuel tank cover 1 closes the filler port 201, the rotation limiting protrusion 602 is embedded in the rotation limiting groove 1201. This will not be described in detail here.

[0030] In this embodiment, the relative positions of the fuel evaporation pipe interface 3 and the fuel overflow pipe interface 4 on the circumferential direction of the lock seat 5 are adjustable. The fuel evaporation component and the fuel overflow component are integrally assembled on the outer ring of the lock seat 5. The installer can freely change the orientation of the two interfaces according to the motorcycle frame or fuel line layout space. During assembly, first loosen the limiting buckle on the outside of the lock seat 5 or fix it with bolts or clips, rotate the fuel evaporation component and the fuel overflow component to adjust the interface orientation, align it with the reserved pipeline route on the vehicle body, and then tighten the limiting structure to complete the positioning. The adjustable design can avoid interference from components such as the frame, wiring harness or shock absorber, without changing the fuel line length or adding additional adapter elbows, reducing the problem of poor ventilation or fuel overflow caused by pipeline bends. At the same time, the overall sealing performance of the lock seat 5 is not affected after the interface is adjusted, and it can still stably export fuel vapor and drain excess fuel. The integrated lock seat structure remains unchanged, which not only retains the advantages of the integrated arrangement of evaporation and overflow, but also greatly expands the range of models that the fuel tank lock is compatible with. Further details will not be elaborated here.

[0031] In this embodiment, the fuel evaporation component includes a vent valve 7 and a fuel evaporation pipe connector 15. The first end of the fuel evaporation pipe connector 15 is fixedly connected to and communicates with the vent valve 7, and the second end forms the fuel evaporation pipe interface 3. The fuel evaporation pipe connector 15 is a tubular connecting component. Its first end is sealed and fixedly connected to the vent valve 7, and the internal cavities of the two are interconnected to form a complete oil and gas flow channel. The connection position is sealed to effectively prevent oil and gas leakage. The second end of the pipe connector 15 is formed into the fuel evaporation pipe interface 3, which is used to connect to the vehicle's fuel evaporation pipeline to achieve compliant export of oil and gas from the fuel tank. As a core pressure control component, the vent valve 7 can precisely regulate the pressure balance inside and outside the fuel tank. During vehicle operation and stationary operation, fuel vapor generated in the fuel tank can be filtered and pressure regulated by the vent valve 7, and then smoothly discharged into the recovery pipeline through the evaporator pipe connector 15 and the evaporator pipe interface 3. This split-combination structure is easy to disassemble and assemble, and convenient for individual inspection and replacement. At the same time, it can be flexibly adapted to the pipeline route with the adjustable interface structure of the lock seat 5. Under the premise of ensuring the stable operation of the fuel evaporation system, it greatly improves the adaptability and durability of the fuel tank lock. Of course, the fuel evaporator pipe interface 3 can also be a separate component, located at the second end of the fuel evaporator pipe connector 15.

[0032] In this embodiment, the fuel overflow component includes a fuel overflow pipe connector 16. The first end of the fuel overflow pipe connector 16 is fixedly connected to and communicates with the lock seat 5, and the second end forms the fuel overflow pipe interface 4. The first end of the fuel overflow pipe connector 16 is sealed and fixedly assembled to the lock seat 5, and the internal channel is completely connected to the fuel tank overflow cavity of the lock seat 5, ensuring that the overflow channel inside the fuel tank is unobstructed. The second end of the fuel overflow pipe connector 16 is directly formed into the fuel overflow pipe interface 4, which can be quickly plugged into and matched with the vehicle overflow pipeline to realize the directional flow of overflowed fuel. In the event of overfilling during daily refueling or when the vehicle is bumpy or tilted, fuel exceeding the safe level in the fuel tank can flow into the fuel overflow pipe connector 16 through the cavity of the locking seat 5, and finally be discharged through the fuel overflow pipe interface 4. This effectively prevents fuel leakage from the gaps in the fuel tank cap, eliminating safety hazards such as fuel leakage or fire. This integrated pipe connector structure requires no additional adapter accessories, has better sealing and structural strength, and can be used with the locking seat 5 to adjust the circumferential position of the interface, flexibly adapting to the pipe layout of different vehicle models. It is easy to disassemble and maintain, effectively improving the safety and compatibility of motorcycle fuel tank use. Of course, the fuel overflow pipe interface 4 can also be a separate component, located at the second end of the fuel overflow pipe connector 16.

[0033] In this embodiment, the lock seat 5 includes a lock tube 501 extending downward along the axial direction and an annular seat 502 formed along the circumferential direction of the lock tube 501. The outer wall of the annular seat 502 is uniformly provided with a plurality of vent valve mounting slots 503 along the circumferential direction. A vent valve 7 can be selectively installed in one of the vent valve mounting slots 503, making the relative positions of the fuel evaporation pipe interface 3 and the fuel overflow pipe interface 4 adjustable in the circumferential direction of the lock seat 5. The outer wall of the annular seat 502 is uniformly provided with a plurality of vent valves along the circumferential direction. There are typically 3-7 mounting slots 503, all with identical specifications and equidistant arrangement, providing multiple mounting points for the breather valve 7. During assembly, workers can select one of the breather valves 7 equipped with the fuel evaporator pipe interface 3 and fix it in any of the breather valve mounting slots 503 according to the overall vehicle piping layout requirements. By changing the breather valve mounting slots 503 in different positions, the circumferential orientation of the fuel evaporator pipe interface 3 can be flexibly changed, while the position of the fuel overflow pipe interface 4 remains fixed, thus allowing for precise adjustment of the two interfaces. With a circumferential relative angle, this structure eliminates the need to adjust the overflow component structure. Interface angle adaptation is achieved simply by switching the vent valve installation position, effectively avoiding interference from components such as the chassis and wiring harness. It adapts to the piping layouts of multiple vehicle models, featuring a simple structure and convenient adjustment, while ensuring the overall sealing and installation stability of the lock seat. Typically, a fuel tank cap connector 6 is located above the lock seat 5. A mounting groove matching the fuel tank cap connector 6 is provided above the lock seat 5, and bolts are used to fix the lock seat 5 and fuel tank cap connector 6 to the installation position of the filler neck 201. Meanwhile, a hinged joint structure is formed between the fuel tank cap 1 and the fuel tank cap connector 6, allowing the fuel tank cap 1 to rotate and open stably. This, combined with the lock body of the fuel tank cap 1, enables the opening, closing, and locking functions of the filler neck 201, which is a conventional setting in the existing technology. It also allows the fuel overflow pipe and fuel evaporation pipe to be routed from outside the fuel tank, eliminating the need to weld overflow pipes and fuel evaporation pipes that pass through the lower shell from inside the fuel tank. This structure does not require replacing the lock seat body; simply changing the vent valve assembly point can adapt to the piping routing of different vehicle models, which will not be elaborated further here.

[0034] The lower surface of the fuel tank cap connector 6 forms a hinge lug 601, and the fuel tank cap 1 forms a hinge joint 101 that extends downward along the opening edge of the fuel tank cap connector 6 and then extends along the lower surface of the fuel tank cap connector 6 toward the hinge lug 601. A hinge shaft passes through the hinge lug 601 and the hinge joint 101 so that one side of the fuel tank cap 1 is hinged to the fuel tank cap connector 6. This is a conventional setting in the prior art and will not be described in detail here.

[0035] In this embodiment, the outer wall of the annular seat 502 between adjacent vent valve mounting slots 503 extends outward in the horizontal direction to form an mounting strip 505 for mounting the lock seat 5 to the filler port 201 of the fuel tank 2. The mounting strip 505 and the annular seat 502 are integrally injection molded, with strong structural integrity, uniform load-bearing capacity, and no risk of loosening during splicing. The mounting strip 505 is arranged in the horizontal direction and fits the assembly end face contour of the fuel tank filler port 201. During assembly, it can be accurately snapped and fitted to the mounting position near the filler port 201 to realize the positioning limit and fixed installation of the lock seat 5. Meanwhile, the mounting strips 505 are spaced apart in the gap of the vent valve mounting groove 503, which will not occupy the valve body installation space or interfere with the assembly and angle adjustment of the vent valve 7. They are fully compatible with the multi-position installation and adjustment structure. Through the multi-point mounting strip limit fixation, the assembly firmness of the lock seat 5 and the fuel tank filler port 201 can be effectively improved, avoiding the lock seat from shifting or tilting due to vehicle bumps and vibrations, ensuring the overall sealing performance of the lock seat, and taking into account the structural installation stability and component adjustment flexibility. Further details will not be elaborated here.

[0036] In this embodiment, the length of the vent valve mounting groove 503 is not less than the length of the vent valve 7, and the ratio of the length of the vent valve mounting groove 503 to the length of the mounting strip 505 is 2 / 3 to 3 / 4. The length of the vent valve mounting groove 503 is not less than the length of the vent valve 7 body. This allows the vent valve 7 to be completely embedded inside the groove, avoiding partial suspension or exposure of the valve body. This ensures that the vent valve 7 is tightly fitted and securely positioned, effectively preventing the valve body from loosening or shifting due to vehicle vibration, and ensuring the long-term stable operation of the fuel evaporation venting structure. Simultaneously, the length ratio of the vent valve mounting groove 503 to the mounting strip 505 is limited to 2 / 3 to 3 / 4, which is the optimal structural fit range. The design ensures that the mounting slot has sufficient installation space to meet the functional requirements of multi-position assembly and angle adjustment of the vent valve, while also retaining enough effective support length for the mounting strip to ensure that the mounting strip and the oil tank filler port are fully in contact, providing a stable installation load-bearing capacity for the lock seat 5. This size design avoids the problems of the slot being too long and weakening the seat strength, or too short and affecting the assembly, so that the adjustment functionality and structural robustness of the lock seat 5 are balanced, improving the overall structural reliability and assembly adaptability.

[0037] The ratio of the depth of the vent valve mounting groove 503 to the length of the outer wall of the annular seat 502 is 1 / 3 to 1 / 2. Compared with a shallow groove structure, the sufficient groove depth can achieve stable mounting and positioning of the vent valve 7, increase the contact area between the valve body and the groove, effectively prevent the valve body from shifting or loosening under vehicle vibration and wind pressure, and ensure the working stability of the fuel evaporation system. At the same time, the groove depth does not exceed half the length of the side wall of the annular seat, which can avoid excessive reduction of the wall thickness of the annular seat due to excessive groove depth, effectively maintain the overall structural rigidity of the lock seat, prevent cracking or deformation at the groove position, and ensure the structural reliability of the lock seat for long-term use. This precise dimensional design not only meets the functional requirements of multi-position assembly and angle adjustment, avoiding problems such as valve body installation shaking and pipeline docking deviation, but also does not damage the overall load-bearing and sealing performance of the lock seat, which will not be elaborated further here.

[0038] In this embodiment, when the lock seat 5 is installed on the filler port 201 of the fuel tank 2, the lock tube 501 extends into the filler port 201 by a set distance; the lock tube 501 extends downward along the axial direction and extends into the filler port 201 by a certain distance during assembly to achieve overall positioning of the lock seat and anti-sway function, i.e., the function of a fuel anti-sway ring.

[0039] It also includes a sealing gasket 8. A sealing groove 504 is formed on the lower surface of the annular seat 502. The sealing gasket 8 is embedded in the sealing groove 504 and forms a seal with the mounting surface of the filler neck 201. The annular sealing groove 504 is formed on the lower surface of the annular seat 502. The sealing gasket 8 is entirely embedded in the sealing groove 504. When assembling the lock seat 5, the sealing gasket 8 is tightly attached to the mounting surface of the filler neck 201, forming an annular compression sealing layer. The sealing gasket 8 can fill the assembly gap, preventing fuel or vapor leakage from the joint between the lock seat 5 and the fuel tank. It also buffers the assembly loosening caused by driving vibrations, improving sealing durability. The overall structure combines adjustable pipeline functionality with sealing protection performance, is easy to assemble and disassemble, provides stable sealing, and improves the safety of the fuel tank lock. Further details are omitted here. The sealing groove 504... 04 The internally embedded annular sealing gasket 8, after assembly, tightly fits the mounting surface of the filler neck 201, achieving a stable end-face sealing effect; at the same time, the sealing gasket 8 has multiple sealing rings 801 evenly arranged radially, forming multiple annular sealing barriers. In this embodiment, there are two sealing rings 801, namely the inner sealing ring and the outer sealing ring. Compared with a single-layer sealing structure, it can block fuel leakage and oil and gas leakage in multiple ways, effectively offsetting the sealing hazards caused by assembly gaps and riding vibrations. This planar fit combined with the multi-ring sealing structure design, together with the adjustable vent valve 7 installation structure of the lock seat 5, greatly improves the sealing performance and stability of the filler neck connection while retaining the adjustable pipeline position and adaptability to multiple models. The structure is durable and reliable, effectively improving the overall safety of the motorcycle fuel tank.

[0040] The lock seat 5, vent valve 7, and fuel tank cap 1 are all nylon-glass fiber composite material components. Similarly, the fuel tank cap connector 6 and lock housing 9 are also nylon-glass fiber composite material components, meaning they are injection molded using nylon-glass fiber composite material. Compared to ordinary plastics and metals, this composite material possesses superior overall performance. Firstly, it is lighter, effectively reducing the overall vehicle assembly load and meeting the lightweight design requirements of motorcycles. Secondly, it has high strength, high toughness, and good structural rigidity, effectively resisting vibrations, impacts, or external pressure during riding, preventing component deformation and cracking. The material possesses excellent oil resistance, corrosion resistance, and weather resistance. Even after prolonged exposure to fuel oil, gas, and outdoor elements, it is not prone to aging, embrittlement, or corrosion failure, ensuring the long-term precision of the sealing, hinged, and locking structures. Furthermore, the nylon-glass fiber composite material exhibits good formability and high dimensional accuracy, guaranteeing uniform assembly gaps between components. Combined with the limiting, sealing, and linkage structures, this significantly improves the overall assembly precision, operational stability, and service life of the fuel tank lock. Preferably, the nylon-glass fiber composite material is a composite of nylon 6 and 30% glass fiber, which will not be elaborated further here.

[0041] In this embodiment, the edge of the filler neck 201 and the fuel tank body 202 form a smooth transition plane. This integrated smooth transition structure eliminates the sharp edges, steps, and dead corners at the root of the filler neck, making the curved surface of the connection continuous, flat, and smooth. When assembling the fuel tank cap, lock seat, and vent valve, the flat mating reference surface allows the components to fit tightly, effectively preventing problems such as loose assembly and poor sealing caused by gaps or steps. This significantly improves the overall sealing performance of the fuel tank, preventing fuel evaporation and leakage, and preventing rainwater and dust from entering the fuel tank. At the same time, the smooth transition structure can effectively reduce stress concentration during use, reducing the risk of cracking and deformation at the filler neck position under vehicle bumps and vibrations, and improving the overall strength and service life of the fuel tank structure. In addition, the flat and smooth outer surface has no dead corners for dust and oil accumulation, facilitating daily cleaning and maintenance. It also has stronger assembly adaptability and can perfectly match the installation requirements of various fuel tank lock seats, sealing gaskets, and vent components, taking into account structural strength, sealing performance, and assembly practicality.

[0042] This invention also discloses a motorcycle, including the aforementioned motorcycle fuel tank lock, which adopts a structure that integrates a fuel evaporation component and a fuel overflow component on the lock seat, and the relative positions of the fuel evaporation pipe interface and the fuel overflow pipe interface in the circumferential direction of the lock seat are adjustable. This not only solves the problems of scattered welding of existing fuel tank functional components, large welding deformation, and poor compatibility with multiple vehicle models, but also achieves integrated overflow, fuel evaporation, anti-surge, and locking sealing functions. At the same time, it uses composite materials to achieve lightweight structure, simplify fuel tank processing procedures, reduce mold development and welding costs, improve the sealing reliability between the fuel tank lock and the fuel tank, and is compatible with various fuel tank pipeline layout schemes. It takes into account lightweight structure, assembly accuracy, and vehicle compatibility, reduces the overall vehicle weight and component cost, and improves fuel safety and long-term stability of the lock body.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A motorcycle fuel tank lock, characterized in that: The device includes a lock seat and a fuel tank cap. The lock seat integrates a fuel evaporator and a fuel overflow component. The fuel evaporator has a fuel evaporator pipe interface for connecting to a fuel evaporator pipe, and the fuel overflow component has a fuel overflow pipe interface for connecting to a fuel overflow pipe.

2. The motorcycle fuel tank lock according to claim 1, characterized in that: The relative positions of the fuel evaporation pipe interface and the fuel overflow pipe interface in the circumferential direction of the lock seat are adjustable.

3. The motorcycle fuel tank lock according to claim 2, characterized in that: The fuel evaporation component includes a vent valve and a fuel evaporation pipe connector. The first end of the fuel evaporation pipe connector is fixedly connected to and communicates with the vent valve, and the second end forms the fuel evaporation pipe interface.

4. The motorcycle fuel tank lock according to claim 3, characterized in that: The fuel overflow component includes a fuel overflow pipe connector, the first end of which is fixedly connected to and communicates with the lock seat, and the second end forms the fuel overflow pipe interface.

5. The motorcycle fuel tank lock according to claim 4, characterized in that: The lock seat includes a lock tube extending downward along the axial direction and an annular seat body formed along the circumferential direction of the lock tube. The outer side wall of the annular seat body is evenly provided with a plurality of vent valve mounting slots along the circumferential direction. The vent valve can be selectively installed in the vent valve mounting slot, so that the relative position of the fuel evaporation pipe interface and the fuel overflow pipe interface in the circumferential direction of the lock seat is adjustable.

6. The motorcycle fuel tank lock according to claim 5, characterized in that: The outer wall of the annular seat between adjacent vent valve mounting slots extends outward in the horizontal direction to form a mounting strip for mounting the lock seat to the filler neck of the oil tank.

7. The motorcycle fuel tank lock according to claim 6, characterized in that: The length of the vent valve mounting groove is not less than the length of the vent valve, and the ratio of the length of the vent valve mounting groove to the length of the mounting strip is 2 / 3-3 / 4. The ratio of the depth of the vent valve mounting groove to the length of the outer wall of the annular seat is 1 / 3 to 1 / 2.

8. The motorcycle fuel tank lock according to claim 5, characterized in that: When the lock seat is installed at the filler neck of the fuel tank, the lock tube extends into the filler neck by a set distance; It also includes a sealing gasket, and a sealing groove is provided on the lower surface of the annular seat. The sealing gasket is embedded in the sealing groove and forms a seal with the mounting surface of the oil filler port. The lock seat, vent valve, and fuel tank cover are all made of nylon-glass fiber composite material.

9. The motorcycle fuel tank lock according to claim 8, characterized in that: The edge of the filler neck is a plane that smoothly transitions to the body of the fuel tank.

10. A motorcycle, characterized in that: Includes the motorcycle fuel tank lock as described in any one of claims 1-9.

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