A fuel tank fixing structure

Abstract

This invention relates to the field of fuel tank fixing technology and discloses a fuel tank fixing structure. This solution uses a snap-fit ​​component fitted onto the outer periphery of the fuel tank. The bottom of the snap-fit ​​component has a protrusion facing away from the fuel tank, which is embedded within a fixed support for fixed installation on the hull. This avoids the traditional bolt-fixing method, where bolts easily loosen under significant inertial forces, leading to insecure fixing and significant swaying or displacement. This solution uses the protrusion at the bottom of the snap-fit ​​component, embedded within the fixed support, to firmly fix the snap-fit ​​component to the support. The snap-fit ​​component is then fixed to the outer periphery of the fuel tank via a tightening assembly, ultimately securing the fuel tank to the fixed support. When the fuel tank needs to be disassembled, simply remove the tightening ring from the hook and move the fuel tank outward through the enlarged opening, enabling quick disassembly of the fuel tank in confined spaces.

Description

Technical Field

[0001] This invention relates to the field of fuel tank fixing technology, and in particular to a fuel tank fixing structure. Background Technology

[0002] Fuel tanks are a key factor in ensuring the normal operation of small hovercraft. The fuel provides energy to the hovercraft's propulsion system, enabling it to generate an air cushion and drive the propellers for navigation. Currently, fuel tanks are typically secured using bolts and restraints to fix them to the hull. However, small hovercraft experience significant acceleration and deceleration at high speeds, resulting in substantial inertial forces on the fuel tank. These forces act on the restraints, easily causing the bolts to loosen. Over time, this leads to significant swaying and displacement between the fuel tank and the hull. Frequent swaying causes severe wear between the fuel tank and the restraints, potentially resulting in rupture and fuel leaks. Summary of the Invention

[0003] The purpose of this invention is to provide a fuel tank fixing structure to solve the problem that the existing fixing methods for marine fuel tanks are unreliable, which can cause the fuel tanks to shake and thus lead to safety accidents.

[0004] To achieve the above objectives, embodiments of this application provide a fuel tank fixing structure, including:

[0005] Fixed support, fixedly installed on the hull;

[0006] A snap-fit ​​component is fitted onto the outer peripheral wall of the fuel tank. One side of the snap-fit ​​component has a tightening assembly, which is used to secure the snap-fit ​​component to the outer peripheral wall of the fuel tank.

[0007] The bottom portion of the snap-fit ​​component deforms in a direction away from the fuel tank to form a protrusion, which is then embedded into the fixed support.

[0008] In some embodiments of this application, the fuel tank fixing structure has an X-direction extending along the length direction of the fuel tank, a Y-direction extending along the width direction of the fuel tank, and a Z-direction extending along the height direction of the fuel tank;

[0009] The protrusion includes an outer protrusion structure and an inner protrusion structure. In the Y direction, the outer protrusion structure is located on both sides of the inner protrusion structure.

[0010] In the Z direction, the length of the outer protrusion is greater than the length of the inner protrusion.

[0011] In some embodiments of this application, the outer protrusion structure includes a plurality of spaced-apart outer protrusions, and the inner protrusion structure includes a plurality of spaced-apart inner protrusions.

[0012] In some embodiments of this application, in the Z direction, the projection of the outer protrusion near the end of the fuel tank is located within the projection range of the outer protrusion away from the fuel tank.

[0013] In the Z direction, the projection of the inner protrusion near the end of the fuel tank is located within the projection range of the inner protrusion away from the end of the fuel tank.

[0014] In some embodiments of this application, the fixed support has a through hole extending along the X direction; an adhesive layer is provided between the fixed support and the hull for fixing the fixed support to the hull.

[0015] In some embodiments of this application, the portion of the fixed support located above the perforation constitutes a support portion;

[0016] In the Z direction, the thickness of the support portion at the position corresponding to the outer protrusion structure is H, and the thickness of the support portion at the position corresponding to the inner protrusion structure is h, where H > h.

[0017] In some embodiments of this application, the snap-fit ​​member has an opening on one side, a hook portion above the opening, and a retaining ring below the opening;

[0018] The tightening assembly includes a tightening ring, one end of which passes through the fixing ring, and the other end of which is hooked to the hook portion.

[0019] In some embodiments of this application, the tightening ring is an elastic structural component.

[0020] In some embodiments of this application, the snap-fit ​​component is a metal structural component, which has a first end and a second end disposed opposite to each other.

[0021] The metal structural component is bent around the outer peripheral wall of the oil tank to form the snap-fit ​​component, and the gap between the first end and the second end forms the opening.

[0022] In the Z direction, the first end is bent away from the opening to form the hook portion; in the Z direction, the second end is bent away from the opening to form the bend portion, and the end of the bend portion away from the opening is fixedly connected to the snap-fit ​​member to form the fixing ring.

[0023] In some embodiments of this application, there are multiple fixed supports, and the multiple fixed supports are spaced apart along the X direction;

[0024] The number of snap-fit ​​components matches the number of fixed supports, and the fixed supports are configured in a one-to-one correspondence with the snap-fit ​​components.

[0025] Compared with the prior art, the fuel tank fixing structure of this invention has the following advantages: This solution uses a snap-fit ​​component fitted onto the outer periphery of the fuel tank. The bottom of the snap-fit ​​component has a protrusion facing away from the fuel tank, which is embedded in a fixed support for fixed installation on the hull. This avoids the traditional bolt-fixing method, where bolts easily loosen when the fuel tank is subjected to large inertial forces, leading to unreliable fixing and significant shaking or displacement. This solution, by providing a protrusion at the bottom of the snap-fit ​​component and embedding it within the fixed support, firmly fixes the snap-fit ​​component to the fixed support. The snap-fit ​​component is then fixed to the outer periphery of the fuel tank by a tightening assembly, ultimately achieving a fixed installation of the fuel tank on the fixed support. Attached Figure Description

[0026] Figure 1 This is a front view of the structure of the fuel tank of the present invention when it is fixed.

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of the first embodiment of the AA section;

[0028] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0029] Figure 4 This is a schematic diagram of the protrusion structure according to the first embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram showing the connection relationship between the snap-fit ​​component and the tightening ring of the present invention;

[0031] Figure 6 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B;

[0032] Figure 7 For the present invention Figure 1 Enlarged schematic diagram of the structure at point C;

[0033] Figure 8 For the present invention Figure 1 Schematic diagram of the second embodiment of the AA section;

[0034] Figure 9 This is a schematic diagram of the protrusion structure according to the second embodiment of the present invention.

[0035] In the diagram, 1 is the fixed support; 11 is the perforation; and 12 is the support component.

[0036] 2. Snap-fit ​​part; 21. Protrusion; 211. Outer protrusion structure; 2111. Outer protrusion; 212. Inner protrusion structure; 2121. Inner protrusion; 22. Hook part; 23. Fixing ring; 24. First end; 25. Second end; 3. Opening; 4. Tightening ring; 5. Fuel tank; 51. Stop part; 6. Hull; 7. Adhesive layer; 8. Rivet. Detailed Implementation

[0037] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0038] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as blocking the invention. It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0039] like Figures 1-9 As shown in the figure, this application proposes a fuel tank fixing structure, including a fixing support 1 and a snap-fit ​​component 2. The fixing support 1 is fixedly installed on the hull 6 and serves as a carrier supporting the fuel tank 5. The snap-fit ​​component 2 is sleeved on the outer peripheral wall of the fuel tank 5. One side of the snap-fit ​​component 2 has a tightening component, which is used to fix the snap-fit ​​component 2 to the outer peripheral wall of the fuel tank 5, so that the snap-fit ​​component 2 and the fuel tank 5 are fixedly connected (the snap-fit ​​component 2 and the fuel tank 5 form an integral part). The bottom part of the snap-fit ​​component 2 deforms in the direction away from the fuel tank 5 to form a protrusion 21. The protrusion 21 is embedded into the fixed support 1 (the protrusion 21 and the fixed support 1 are connected as one unit), so that the snap fastener 2 is fixedly connected to the fixed support 1 through the protrusion 21; under the action of the tightening component, the snap fastener 2 is tightly fitted onto the outer peripheral wall of the oil tank 5, so that the snap fastener 2 and the oil tank 5 are fixedly installed, and the bottom of the snap fastener 2 is fixedly connected to the fixed support 1 through the snap fastener 2 and the protrusion 21 at the bottom of the snap fastener 2. Finally, the oil tank 5 is fixed on the fixed support 1 through the snap fastener 2 and the protrusion 21 at the bottom of the snap fastener 2.

[0040] The fixed support 1 in this design is made of fiberglass reinforced plastic (FRP), a type of fiber-reinforced plastic that is lightweight yet strong, with stable performance, high mechanical strength, and corrosion resistance. Conventional FRP structural components are manufactured using a mold casting method, where resin and reinforcing materials are mixed in a specific ratio, the mixture is placed into a mold, and pressure is applied to form the component. The component is then cured and demolded at a specific temperature to complete the manufacturing process. In this design, to ensure the protrusion 21 at the bottom of the snap-fit ​​component 2 can be embedded into the fixed support 1, the protrusion 21 is simultaneously embedded into the mixed material to a certain depth while the resin and reinforcing materials are mixed and placed into the mold. This ensures the protrusion 21 is completely submerged in the mixed material. Subsequently, it is pressure-formed and cured at a specific temperature to obtain the final product. Figure 2 The structure shown illustrates that the protrusion 21 at the bottom of the snap-fit ​​2 is embedded within the fixed support 1, forming a single unit with it, thus ensuring a secure connection between the snap-fit ​​2 and the fixed support 1. This avoids the traditional method of fixing with bolts, where the acceleration and deceleration generated during high-speed movement of the hull 6 subject the fuel tank 5 to significant inertial forces. These forces, transmitted to the bolted connections, can easily loosen, causing the fuel tank 5 to sway considerably and potentially leading to safety hazards. Figure 1 , Figure 7 As shown, a stop part 51 is provided on both sides of the latching member 2 along the X direction on the top wall of the oil tank 5, so that the latching member 2 is between the two stop parts 51, which can suppress the relative shaking of the oil tank 5 and the latching member 2 in the X direction.

[0041] In some embodiments of this application, such as Figure 1 , Figure 2As shown, the fuel tank fixing structure has an X-direction extending along the length of the fuel tank 5, a Y-direction extending along the width of the fuel tank 5, and a Z-direction extending along the height of the fuel tank 5. The protrusion 21 includes an outer protrusion structure 211 and an inner protrusion structure 212. In the Y-direction, the outer protrusion structure 211 is located on both sides of the inner protrusion structure 212. In the Z-direction, the length of the outer protrusion 2111 is greater than the length of the inner protrusion 2121, that is, the size of the outer protrusion structure 211 is greater than the size of the inner protrusion structure 212. The outer protrusion structure 211 is embedded deeper into the fixing support 1 (the inner protrusion structure 212 is embedded relatively shallower into the fixing support 1). This is because the hull 6 is in a high-speed navigation process. When the fuel tank 5 is subjected to an inertial force along the Y direction, the inertial force is transmitted to the fixed support 1 through the snap-fit ​​2. The snap-fit ​​2 is connected and fixed to the fixed support 1 through the outer protrusion structure 211 and the inner protrusion structure 212. When the fuel tank 5 is subjected to an inertial force along the Y direction, it tends to sway along the Y direction. At this time, the load force on the outer protrusion structure 211 is greater than the load force on the inner protrusion structure 212. By setting the length of the outer protrusion structure 211 to be longer and embedding it deeper into the fixed support 1, the connection between the outer protrusion structure 211 and the fixed support 1 becomes more firm and reliable, thus improving the fixing effect of the fuel tank 5.

[0042] In some embodiments of this application, such as Figure 4 As shown, the outer protrusion structure 211 includes multiple spaced outer protrusions 2111, and the inner protrusion structure 21 includes multiple spaced inner protrusions 2121. The arrangement of multiple outer protrusions 2111 and multiple inner protrusions 2121 increases the contact area between the snap-fit ​​member 2 and the fixed support 1. The increased contact area increases the connection strength between the snap-fit ​​member 2 and the fixed support 1. When the oil tank 5 is subjected to a large inertial force and transmitted through the snap-fit ​​member 2 to the connection between the outer protrusions 2111, the inner protrusions 2121 and the fixed support 1, the larger contact area helps to distribute the load force, thereby reducing the load force on each outer protrusion structure 211 and each inner protrusion structure 212, which in turn helps to improve the stability of the connection between the snap-fit ​​member 2 and the fixed support 1.

[0043] like Figure 8 , Figure 9As shown, this application provides another embodiment of the external protrusion structure 211. In this embodiment, the projection of the external protrusion structure 211 near the oil tank 5 in the Z direction is still within the range of the projection of the external protrusion structure 211 away from the oil tank 5 in the Z direction. The difference from the above embodiment is that multiple concave and convex portions are provided at the end of the external protrusion structure 211 away from the oil tank 5. The arrangement of multiple concave and convex portions can also increase the contact area between the external protrusion structure 211 and the fixed support 1, improve the connection strength between the external protrusion structure 211 and the fixed support 1 (so that the external protrusion structure 211 can withstand stronger pull-out force), and help improve the fixing effect of the oil tank 5.

[0044] In some embodiments of this application, such as Figure 4 , Figure 6 As shown, in the Z direction, the projection of the outer protrusion 2111 near the end of the oil tank 5 is located within the projection range of the outer protrusion 2111 away from the oil tank 5; in the Z direction, the projection of the inner protrusion 2121 near the end of the oil tank 5 is located within the projection range of the inner protrusion 2121 away from the oil tank 5.

[0045] That is, in this scheme, both the outer protrusion structure 211 and the inner protrusion structure 212 are designed with a small upper end and a large lower end (similar to a cone). When the outer protrusion structure 211 and the inner protrusion structure 212 are embedded in the fixed support 1, due to their small upper end and large lower end, both the outer protrusion 2111 and the inner protrusion 2121 can withstand a large pull-out load. The inertial force on the oil tank 5 is transmitted to the snap-fit ​​2 and then to the fixed support 1 through the outer protrusion structure 211 and the inner protrusion structure 212, making it more difficult for the outer protrusion structure 211 and the inner protrusion structure 212 to be pulled out of the fixed support 1, further improving the connection strength between the snap-fit ​​2 and the fixed support 1.

[0046] In some embodiments of this application, such as Figure 6 As shown, the fixed support 1 has a through hole 11 extending along the X direction. The through hole 11 helps to reduce the weight of the fixed support 1 and avoids increasing the weight of the hull 6; as Figure 1 , Figure 2As shown, the hull 6 has a groove that matches the fixed support 1 and is used to accommodate the fixed support 1. The outer periphery of the fixed support 1 is fitted to the groove wall. A layer of structural adhesive is applied between the outer periphery of the fixed support 1 and the groove wall to achieve a fixed connection between the fixed support 1 and the hull 6. The structural adhesive is evenly applied between the outer periphery of the fixed support 1 and the groove wall to form an adhesive layer. In this scheme, the fixed support 1 and the hull 6 have a large contact surface and structural adhesive is applied between the contact surfaces. When the inertial force on the fuel tank 5 is transmitted to the fixed support 1, the load force on the fixed support 1 is transmitted to the fixed support 1 and the groove wall in the hull 6 used to accommodate the fixed support 1. Since there is a large contact area between the fixed support 1 and the groove wall (the aforementioned contact surface is coated with structural adhesive), a reliable connection between the fixed support 1 and the hull 6 is achieved.

[0047] In some embodiments of this application, such as Figure 2 As shown, the fixed support 1 located above the perforation 11 constitutes a support part 12 (for supporting the oil tank 5); in the Z direction, the thickness of the support part 12 corresponding to the position of the outer protrusion structure 211 is H, and the thickness of the support part 12 corresponding to the position of the inner protrusion structure 212 is h, where H > h; when the oil tank 5 is subjected to inertial force, the load force on the outer protrusion structure 211 on both sides is relatively large, and consequently the load force on the fixed support 1 at the contact part of the outer protrusion structure 211 is also relatively large. In this embodiment, the support part 12 corresponding to the outer protrusion structure 211 is made thicker (the support part 12 corresponding to the inner protrusion structure 212 is made relatively thinner), which helps to improve the connection strength between the outer protrusion structure 211 and the fixed support 1, and achieves a reliable connection between the snap-fit ​​2 and the fixed support 1 while satisfying the requirement of opening the perforation 11 (reducing the weight of the fixed support 1).

[0048] In some embodiments of this application, such as Figure 3 As shown, the snap-fit ​​component 2 has an opening 3 on one side, a hook portion 22 above the opening 3, and a fixing ring 23 below the opening 3; the tightening assembly includes a tightening ring 4, one end of which passes through the fixing ring 23, and the other end of which is hung on the hook portion 22; thereby tightening the snap-fit ​​component 2 and making it tightly fit against the outer peripheral wall of the oil tank 5, thus achieving the effect of tightening and constraining the oil tank 5.

[0049] In some embodiments of this application, the tightening ring 4 in this solution is an elastic structural component, so that the operator can easily remove the tightening ring 4 from the hook portion 22 (for disassembling and replacing the oil tank 5), or easily hang the tightening ring 4 on the hook portion 22 to fix the oil tank 5.

[0050] In some embodiments of this application, the snap-fit ​​component 2 in this solution is a metal structural component (set in the shape of a long strip). The metal structural component is bent around the outer peripheral wall of the fuel tank 5 to form the snap-fit ​​component 2 (the metal structural component is pre-bent according to the size of the fuel tank 5 to form a shape that matches the contour of the fuel tank 5); the outer protrusion structure 211 and the inner protrusion structure 212 in this solution are both formed by bending the metal structural component at a designated location; the metal structural component has a first end 24 and a second end 25 arranged opposite to each other, and the gap between the first end 24 and the second end 25 forms an opening 3; and has a certain deformation characteristic. When the first end 24 and the second end 25 are pulled forcefully, the opening 3 is opened, and the fuel tank 5 is placed into the snap-fit ​​component 2, and then the snap-fit ​​component 2 is fitted onto the outer peripheral wall of the fuel tank 5; as Figure 3 As shown, in the Z direction, the first end 24 is bent away from the opening 3 to form a hook portion 22; in the Z direction, the second end 25 is bent away from the opening 3 to form a bend portion. The bend portion away from the opening 3 is fixedly connected to the snap-fit ​​part 2. Specifically, the bend portion away from the opening 3 is fixedly connected to the snap-fit ​​part 2 by means of aluminum rivets 8, so that the bend portion away from the opening 3 is closed and a fixing ring 23 is formed. Before the bend portion and the snap-fit ​​part 2 are fixedly connected by rivets 8, the tightening ring 4 is first inserted into the hole between the bend portion and the snap-fit ​​part 2. Then, the bend portion away from the opening 3 is fixedly connected to the snap-fit ​​part 2 by means of rivets 8. At this time, the tightening ring 4 is inserted into the fixing ring 23. When fixing the oil tank 5, the tightening ring 4 is hung on the hook portion 22 to tighten the snap-fit ​​part 2, thereby tightly binding the snap-fit ​​part 2 to the outer peripheral wall of the oil tank 5 to achieve the fixing of the oil tank 5.

[0051] When the fuel tank 5 needs to be replaced, simply remove the tightening ring 4 from the hook part 22 to open the opening 3. Then, pull the first end 24 and the second end 25 with force to deform the snap-fit ​​part 2, so that the fuel tank 5 can be moved out from between the first end 24 and the second end 25, thus enabling the fuel tank 5 to be quickly disassembled and replaced in a confined space.

[0052] In some embodiments of this application, such as Figure 1 As shown, along the X direction (the direction of the length extension of the fuel tank 5), there are multiple fixed supports 1. The multiple fixed supports 1 are all spaced apart along the X direction. The number of snap-fit ​​pieces 2 matches the number of fixed supports 1. The fixed supports 1 and snap-fit ​​pieces 2 are set in a one-to-one correspondence. The multiple matching snap-fit ​​pieces 2 and fixed supports 1 are used to reliably fix the fuel tank 5 in the hull 6.

[0053] The working process of this invention is as follows: the fuel tank 5 is inserted into the snap-fit ​​part 2 through the opening 3 from the first end 24 and the second end 25, and the snap-fit ​​part 2 is tightly attached to the outer peripheral wall of the fuel tank 5 by the tightening ring 4, thereby securing the snap-fit ​​part 2 to the outer peripheral wall of the fuel tank 5 and achieving a fixed installation between the snap-fit ​​part 2 and the fuel tank 5; the bottom of the snap-fit ​​part 2 is provided with multiple external protrusions 211 and internal protrusions 212, all of which are embedded in the fixed support 1, thereby achieving a reliable connection between the snap-fit ​​part 2 and the fixed support 1, and finally the fuel tank 5 is fixed to the hull 6 by the fixed support 1 and the snap-fit ​​part 2; when it is necessary to disassemble and replace the fuel tank 5, simply remove the tightening ring 4 from the hook part 22, pull the first end 24 and the second end 25 with force, so that the opening 3 between the first end 24 and the second end 25 becomes larger, and move the fuel tank 5 outward from the enlarged opening 3 (completing the disassembly and replacement of the fuel tank 5).

[0054] In summary, this embodiment of the invention provides a fuel tank fixing structure. This solution uses a snap-fit ​​component 2 fitted onto the outer periphery of the fuel tank 5. The bottom of the snap-fit ​​component 2 has a protrusion 21 facing away from the fuel tank 5. The protrusion 21 is embedded within the fixing support 1, which is fixedly installed with the hull 6. This avoids the traditional bolt-fixing method, where bolts are prone to loosening when the fuel tank 5 is subjected to significant inertial force, leading to insecure fixing and significant shaking or displacement. This solution uses the protrusion 21 at the bottom of the snap-fit ​​component 2, embedded within the fixing support 1, to firmly fix the snap-fit ​​component 2 to the fixing support 1. The snap-fit ​​component 2 is then fitted and fixed to the outer periphery of the fuel tank 5 by a tightening assembly, ultimately securing the fuel tank 5 to the fixing support 1.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A fuel tank fixing structure, characterized in that, include: Fixed support (1), fixedly installed on the hull (6); A snap-fit ​​component (2) is fitted onto the outer peripheral wall of the oil tank (5). One side of the snap-fit ​​component (2) has a tightening component, which is used to secure the snap-fit ​​component (2) to the outer peripheral wall of the oil tank (5). The bottom portion of the snap-fit ​​member (2) deforms in a direction away from the oil tank (5) to form a protrusion (21), and the protrusion (21) is embedded in the fixed support (1); The oil tank fixing structure has an X-direction extending along the length direction of the oil tank (5), a Y-direction extending along the width direction of the oil tank (5), and a Z-direction extending along the height direction of the oil tank (5). The protrusion (21) includes an outer protrusion structure (211) and an inner protrusion structure (212). In the Y direction, the outer protrusion structure (211) is located on both sides of the inner protrusion structure (212). In the Z direction, the length of the outer protrusion structure (211) is greater than the length of the inner protrusion structure (212); The outer protrusion structure (211) includes a plurality of spaced-apart outer protrusions (2111), and the inner protrusion structure includes a plurality of spaced-apart inner protrusions (2121). In the Z direction, the projection of the outer protrusion (2111) near the end of the oil tank (5) is located within the projection range of the outer protrusion (2111) away from the oil tank (5); In the Z direction, the projection of the inner protrusion (2121) near the end of the oil tank (5) is located within the projection range of the inner protrusion (2121) away from the end of the oil tank (5).

2. The fuel tank fixing structure according to claim 1, characterized in that, The fixed support (1) has a through hole (11) that runs through the X direction; An adhesive layer (7) is provided between the fixed support (1) and the hull (6) for fixing the fixed support (1) to the hull (6).

3. The fuel tank fixing structure according to claim 2, characterized in that, The portion of the fixed support (1) located above the perforation (11) constitutes a support portion (12); In the Z direction, the thickness of the support part (12) at the position corresponding to the outer protrusion structure (211) is H, and the thickness of the support part (12) at the position corresponding to the inner protrusion structure (212) is h, where H > h.

4. The fuel tank fixing structure according to claim 1, characterized in that, The snap-fit ​​component (2) has an opening (3) on one side, the snap-fit ​​component (2) has a hook portion (22) above the opening (3), and the snap-fit ​​component (2) has a retaining ring (23) below the opening (3); The tightening assembly includes a tightening ring (4), one end of which passes through the fixing ring (23), and the other end of which is hung on the hook portion (22).

5. The fuel tank fixing structure according to claim 4, characterized in that, The tightening ring (4) is an elastic structural component.

6. The fuel tank fixing structure according to claim 4, characterized in that, The snap-fit ​​component (2) is a metal structural component, which has a first end (24) and a second end (25) disposed opposite to each other; The metal structural component is bent around the outer peripheral wall of the oil tank (5) to form the snap-fit ​​component (2), and the gap between the first end (24) and the second end (25) forms the opening (3); In the Z direction, the first end (24) is bent away from the opening (3) to form the hook portion (22); in the Z direction, the second end (25) is bent away from the opening (3) to form a bend portion, and the end of the bend portion away from the opening (3) is fixedly connected to the snap-fit ​​member (2) to form the fixing ring (23).

7. The fuel tank fixing structure according to any one of claims 1-6, characterized in that, The fixed support (1) is provided in multiple ways, and the multiple fixed supports (1) are all spaced apart along the X direction; The number of the snap-fit ​​pieces (2) matches the number of the fixed supports (1), and the fixed supports (1) and the snap-fit ​​pieces (2) are set in a one-to-one correspondence.

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