Oil tank fixing structure

Abstract

The invention relates to the technical field of oil tank fixing, and discloses an oil tank fixing structure. According to the scheme, a clamping piece is fixedly arranged on the peripheral wall of an oil tank in a sleeving mode, a protruding part is arranged at the bottom of the clamping piece in the direction away from the oil tank, and the protruding part is embedded in a fixing support fixedly installed on a ship body, so that the traditional mode that bolts are adopted for fixing is avoided; when the oil tank is subjected to large inertia force, a bolt is prone to loosening, so that the oil tank is not firmly fixed, and large-amplitude shaking displacement is generated. According to the scheme, the protruding part is arranged at the bottom of the clamping piece and embedded in the fixing support, so that the clamping piece is firmly fixed to the fixing support, the clamping piece is fixedly arranged on the peripheral wall of the oil tank in a sleeving mode through the tightening assembly, and finally the oil tank is fixedly installed on the fixing support; when the oil tank needs to be disassembled, the tightening ring only needs to be taken down from the hook part, the oil tank is moved outwards from the enlarged opening, and rapid disassembly of the oil tank in a narrow space is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil tank fixing, and in particular to an oil tank fixing structure. Background Art

[0002] The use of fuel tanks for fuel storage in small hovercraft is one of the key factors to ensure its normal operation. The fuel reserve provides energy for the hovercraft's power unit, enabling it to generate an air cushion and drive the propeller, thereby achieving navigation. Currently, bolts and restraints are mostly used in combination to fix the fuel tank in the hull. When a small hovercraft is sailing at high speed, it will produce large acceleration and deceleration, which will cause the fuel tank to be subjected to a large inertial force. The inertial force exerted on the fuel tank acts on the restraint, which can easily cause the bolts to loosen. Over time, a large degree of shaking and displacement will occur between the fuel tank and the hull. Frequent shaking will cause heavy wear between the fuel tank and the restraint, and severe ruptures may occur, leading to safety accidents such as fuel leakage. Summary of the invention

[0003] The purpose of the present invention is to provide an oil tank fixing structure, which is used to solve the problem that the fixing method of the ship oil tank in the prior art is unreliable, which causes the oil tank to shake easily and thus causes safety accidents.

[0004] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a fuel tank fixing structure, comprising:

[0005] A fixed support, fixedly installed on the hull;

[0006] A clamping piece is sleeved on the outer peripheral wall of the oil tank, and one side of the clamping piece has a tightening assembly, and the tightening assembly is used to sleeve and fix the clamping piece on the outer peripheral wall of the oil tank;

[0007] The bottom portion of the clamping member is deformed in a direction away from the oil tank to form a protrusion, and the protrusion is embedded in the fixing support.

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

[0009] The protrusion comprises an outer protrusion structure and an inner protrusion structure, and 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 structure is greater than the length of the inner protrusion structure.

[0011] In some embodiments of the present application, the outer protrusion structure includes a plurality of outer protrusions arranged at intervals, and the inner protrusion portion includes a plurality of inner protrusions arranged at intervals.

[0012] In some embodiments of the present application, in the Z direction, the projection of the outer protrusion close to one end of the oil tank is located within the projection range of the outer protrusion away from one end of the oil tank;

[0013] In the Z direction, a projection of the inner protrusion close to one end of the oil tank is located within a projection range of the inner protrusion away from one end of the oil tank.

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

[0015] In some embodiments of the present application, the portion of the fixed support located above the through hole constitutes a support portion;

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

[0017] In some embodiments of the present application, one side of the clamping member has an opening, the clamping member has a hook portion located above the opening, and the clamping member has a fixing ring located below the opening;

[0018] The tightening assembly comprises a tightening ring, one end of which is passed through the fixing ring, and the other end of which is hung on the hook portion.

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

[0020] In some embodiments of the present application, the clamping member is a metal structural member, and the metal structural member has a first end and a second end arranged opposite to each other;

[0021] The metal structure is bent around the outer peripheral wall of the oil tank to form the clamping member, and the interval 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 a bent portion, and the bent portion is fixedly connected to the clamping member at one end away from the opening to form the fixing ring.

[0023] In some embodiments of the present application, there are multiple fixed supports, and the multiple fixed supports are arranged at intervals along the X direction;

[0024] The number of the clamping parts matches the number of the fixing supports, and the fixing supports are arranged in a one-to-one correspondence with the clamping parts.

[0025] Compared with the prior art, the beneficial effect of an oil tank fixing structure in an embodiment of the present invention is that: the present solution has a clamping piece sleeved on the outer peripheral wall of the oil tank, and a protrusion is provided on the bottom of the clamping piece facing away from the oil tank, and the protrusion is embedded in a fixed support fixed to the hull, thereby avoiding the traditional method of fixing with bolts. When the oil tank is subjected to a large inertial force, the bolts are easy to loosen, resulting in an unreliable fixation of the oil tank and a large degree of shaking and displacement; the present solution has a protrusion provided at the bottom of the clamping piece and the protrusion is embedded in the fixed support, so as to realize that the clamping piece is firmly fixed on the fixed support, and the clamping piece is fixed to the outer peripheral wall of the oil tank by a tightening assembly, and finally the oil tank is fixed on the fixed support. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view structural schematic diagram of the oil tank of the present invention when it is fixed;

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

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

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

[0030] Figure 5 This is a schematic diagram of the connection relationship between the clamping member and the tightening ring of the present invention;

[0031] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0032] Figure 7 For the present invention Figure 1 A magnified schematic diagram of the structure at C in the middle;

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

[0034] Fig. 9 Schematic diagram of the protrusion structure of the second embodiment of the present invention.

[0035] In the figure, 1, fixed support; 11, perforation; 12, support part;

[0036] 2. Snap-fit ​​part; 21. Raised part; 211. External raised structure; 2111. External raised part; 212. Internal raised structure; 2121. Internal raised part; 22. Hook part; 23. Fixing ring; 24. First end; 25. Second end; 3. Opening; 4. Tightening ring; 5. Fuel tank; 51. Stopper; 6. Hull; 7. Adhesive layer; 8. Rivet. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a hindrance to the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0039] like Figure 1-Figure 9 As shown, the embodiment of the present application proposes a fuel tank fixing structure, including a fixing support 1 and a clamping member 2; the fixing support 1 is fixedly installed on the hull 6, the fixing support 1 serves as a carrier for supporting the fuel tank 5, the clamping member 2 is sleeved on the outer peripheral wall of the fuel tank 5, and one side of the clamping member 2 has a tightening component, which is used to sleeve the clamping member 2 on the outer peripheral wall of the fuel tank 5, so that a fixed connection is achieved between the clamping member 2 and the fuel tank 5 (the clamping member 2 and the fuel tank 5 form a whole); the bottom part of the clamping member 2 is deformed in a direction away from the fuel tank 5 to form a convex portion 21 The protrusion 21 is embedded in the fixed support 1 (the protrusion 21 and the fixed support 1 are connected as a whole), so that the clamping piece 2 is fixedly connected to the fixed support 1 through the protrusion 21; under the action of the tightening assembly, the clamping piece 2 is tightly sleeved on the outer peripheral wall of the oil tank 5, so that the clamping piece 2 and the oil tank 5 are fixedly installed, and the bottom diameter protrusion 21 of the clamping piece 2 is fixedly connected to the fixed support 1, and finally the oil tank 5 is fixed to the fixed support 1 through the clamping piece 2 and the protrusion 21 arranged at the bottom of the clamping piece 2.

[0040] The material of the fixed support 1 in the present solution is glass fiber reinforced plastic, which is a fiber reinforced plastic with light weight and hardness, stable performance, high mechanical strength and corrosion resistance; conventional glass fiber reinforced plastic structural parts are prepared by mold casting, that is, resin and reinforcing material are mixed in a certain proportion, the mixed material is placed in a mold, formed by pressure, and then cured and demolded at a certain temperature to complete the preparation; in the present solution, in order to enable the raised portion 21 at the bottom of the clamping member 2 to be embedded in the fixed support 1, when the resin and reinforcing material are mixed in a certain proportion and placed in the mold, the raised portion 21 at the bottom of the clamping member 2 is simultaneously embedded in the mixed material to a certain depth, so that the raised portion 21 is completely immersed in the mixed material, and then pressure molding is performed and cured at a certain temperature, and finally the following is obtained. Figure 2 The structure shown in the figure, that is, the protrusion 21 at the bottom of the clamping member 2 is embedded in the fixed support 1, and is connected to the fixed support 1 as a whole, so that the clamping member 2 and the fixed support 1 are firmly connected. Avoid the traditional method of fixing with bolts. When the acceleration and deceleration generated by the hull 6 during high-speed movement causes the fuel tank 5 to be subjected to a large inertial force, the large inertial force is transmitted to the bolt connection, making the bolts easy to loosen, causing the fuel tank 5 to shake to a large extent, which is easy to cause safety accidents; Figure 1 , Figure 7 As shown, stoppers 51 are provided on the top wall of the oil tank 5 at both sides of the clamping member 2 along the X direction, so that the clamping member 2 is located between the two stoppers 51, which can suppress the relative shaking of the oil tank 5 and the clamping member 2 in the X direction.

[0041] In some embodiments of the present application, Figure 1 , Figure 2As shown, the tank fixing structure has an X direction extending along the length direction of the tank 5, a Y direction extending along the width direction of the tank 5, and a Z direction extending along the height direction of the tank 5; the protrusion 21 includes an outer protrusion structure 211 and an inner protrusion structure 212, and 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, and the outer protrusion structure 211 is embedded deeper into the fixing support 1 (the depth of the inner protrusion structure 212 embedded into the fixing support 1 is relatively shallower); the reason for this arrangement is that the hull 6 is in the high-speed heading process When the oil tank 5 is subjected to the inertial force along the Y direction, the inertial force will be transmitted to the fixed support 1 through the clamping part 2, and the clamping part 2 is connected and fixed to the fixed support 1 through the outer protrusion structure 211 and the inner protrusion structure 212. When the oil tank 5 is subjected to the inertial force along the Y direction, it has a tendency to shake along the Y direction. At this time, the load force borne by the outer protrusion structure 211 on the outside is greater than the load force borne by the inner protrusion structure 212 on the inside. The length of the outer protrusion structure 211 on the outside is set to be longer and the depth of the outer protrusion structure 211 embedded in the fixed support 1 is deeper, so that the connection between the outer protrusion structure 211 on the outside and the fixed support 1 is more firm and reliable, thereby improving the fixing effect of the oil tank 5.

[0042] In some embodiments of the present application, Figure 4 As shown, the outer protrusion structure 211 includes a plurality of outer protrusions 2111 disposed at intervals, and the inner protrusion 21 includes a plurality of inner protrusions 2121 disposed at intervals. The arrangement of the plurality of outer protrusions 2111 and the plurality of inner protrusions 2121 increases the contact area between the clamping member 2 and the fixed support 1. The increase in the contact area increases the connection strength between the clamping member 2 and the fixed support 1. When the oil tank 5 is subjected to a large inertial force and is transmitted to the connection between the outer protrusion 2111, the inner protrusion 2121 and the fixed support 1 through the clamping member 2, the larger contact area helps to share the load force, so that the load force on each outer protrusion structure 211 and each inner protrusion structure 212 is reduced, thereby helping to improve the stability of the connection between the clamping member 2 and the fixed support 1.

[0043] like Figure 8 , Fig. 9As shown, the present application provides another embodiment of the external protrusion structure 211, in which the projection of the end of the external protrusion structure 211 close to the oil tank 5 in the Z direction is still within the range of the projection of the end of the external protrusion structure 211 away from the oil tank 5 in the Z direction. The difference from the above embodiment is that a plurality of concave-convex portions are provided at the end of the external protrusion structure 211 away from the oil tank 5. The arrangement of the plurality of concave-convex portions can also increase the contact area between the external protrusion structure 211 and the fixed support 1, thereby improving the connection strength between the external protrusion structure 211 and the fixed support 1 (enabling the external protrusion structure 211 to withstand a stronger pull-out force), which helps to improve the fixing effect on the oil tank 5.

[0044] In some embodiments of the present application, 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 end of 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.

[0045] That is, in the present embodiment, the outer protrusion structure 211 and the inner protrusion structure 212 are both configured to have a small upper end and a large bottom 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 bottom end, the outer protrusion 2111 and the inner protrusion 2121 can withstand a large pull-out load; the inertial force exerted on the oil tank 5 is transmitted to the clamping part 2 and transmitted 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 from the fixed support 1, thereby further improving the connection strength between the clamping part 2 and the fixed support 1.

[0046] In some embodiments of the present application, Figure 6 As shown, the fixed support 1 has a through hole 11 extending through the X direction. The setting of the through hole 11 helps to reduce the deadweight of the fixed support 1 and avoid increasing the weight of the hull 6. Figure 1 , Figure 2As shown, the hull 6 has a groove matching the fixed support 1 and is used to accommodate the fixed support 1. The outer periphery of the fixed support 1 fits with the groove wall, and a layer of structural adhesive is applied between the outer peripheral wall 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 peripheral wall of the fixed support 1 and the groove wall to form a bonding layer; in this scheme, there is a large contact surface between the fixed support 1 and the hull 6 and structural adhesive is applied between the contact surfaces. When the inertial force exerted on the oil tank 5 is transmitted to the fixed support 1, the load force exerted on the fixed support 1 is transmitted to the fixed support 1 and the groove wall in the hull 6 for accommodating the fixed support 1. Since there is a large contact area between the fixed support 1 and the groove wall (structural adhesive is applied at the above-mentioned contact surface), a reliable connection between the fixed support 1 and the hull 6 is achieved.

[0047] In some embodiments of the present application, Figure 2 As shown, the part of the fixed support 1 located above the through hole 11 constitutes a support portion 12 (for supporting the oil tank 5); in the Z direction, the thickness of the support portion 12 at the corresponding position of the outer protrusion structure 211 is H, and the thickness of the support portion 12 at the corresponding position of the inner protrusion structure 212 is h, and H>h; when the oil tank 5 is subjected to inertial force, the load force borne by the outer protrusion structures 211 on both sides is relatively large, and thus the load force exerted by the outer protrusion structure 211 on the fixed support 1 at the contact position therewith is also relatively large. In this embodiment, the support portion 12 corresponding to the outer protrusion structure 211 is set thicker (the support portion 12 position corresponding to the inner protrusion structure 212 is set relatively thinner), which helps to improve the connection strength between the outer protrusion structure 211 and the fixed support 1, and realizes a reliable connection between the clamping member 2 and the fixed support 1 while satisfying the requirement of opening the through hole 11 (reducing the dead weight of the fixed support 1).

[0048] In some embodiments of the present application, Figure 3 As shown, an opening 3 is provided on one side of the clamping member 2, the clamping member 2 is provided with a hook portion 22 located above the opening 3, and the clamping member 2 is provided with a fixing ring 23 located below the opening 3; the tightening assembly includes a tightening ring 4, one end of the tightening ring 4 is passed through the fixing ring 23, and the other end of the tightening ring 4 is hung on the hook portion 22; thereby, the clamping member 2 is tightened and made to fit tightly against the outer peripheral wall of the oil tank 5, thereby achieving the effect of tightening and restraining the oil tank 5.

[0049] In some embodiments of the present application, the tightening ring 4 in this solution is an elastic structural part, so that the staff can operate the tightening ring 4 to remove it from the hook part 22 (for disassembly and replacement of the oil tank 5), or to hang the tightening ring 4 on the hook part 22 to fix the oil tank 5.

[0050] In some embodiments of the present application, the clamping member 2 in this solution is a metal structural member (arranged in a long strip shape), and the metal structural member is bent around the outer peripheral wall of the fuel tank 5 to form the clamping member 2 (the metal structural member is pre-bent according to the size of the fuel tank 5 and formed into a shape matching 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 member at a designated position; the metal structural member has a first end 24 and a second end 25 arranged relatively to each other, and the interval 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 with force, the opening 3 is opened, and the fuel tank 5 is placed into the clamping member 2, and then the clamping member 2 is sleeved on the outer peripheral wall of the fuel tank 5; Figure 3 As shown, in the Z direction, the first end 24 is bent toward the direction away from the opening 3 to form a hook portion 22; in the Z direction, the second end 25 is bent toward the direction away from the opening 3 to form a bent portion, and the end of the bent portion away from the opening 3 is fixedly connected to the clamping member 2. Specifically: the end of the bent portion away from the opening 3 is fixedly connected to the clamping member 2 by an aluminum rivet 8, so that the end of the bent portion away from the opening 3 is closed and a fixing ring 23 is formed; before the bent portion and the clamping member 2 are fixedly connected by the rivet 8, the tightening ring 4 is first inserted into the hole surrounded by the bent portion and the clamping member 2, and then the end of the bent portion away from the opening 3 is fixedly connected to the clamping member 2 by the rivet 8. At this time, the tightening ring 4 is inserted into the fixing ring 23. When fixing the fuel tank 5, the tightening ring 4 can be hung on the hook portion 22 to tighten the clamping member 2, thereby tightly tightening the clamping member 2 to the outer peripheral wall of the fuel tank 5, so as to fix the fuel tank 5.

[0051] When the oil tank 5 needs to be replaced, the tightening ring 4 is directly removed from the hook portion 22 to open the opening 3, and then the first end 24 and the second end 25 are pulled forcefully to deform the clamping member 2, so that the oil tank 5 can be moved out from between the first end 24 and the second end 25, thereby realizing rapid disassembly and replacement of the oil tank 5 in a narrow space.

[0052] In some embodiments of the present application, Figure 1 As shown, along the X direction (the direction in which the length of the oil tank 5 is extended), there are multiple fixed supports 1, and the multiple fixed supports 1 are arranged at intervals along the X direction. The number of clips 2 matches the number of fixed supports 1, and the fixed supports 1 and the clips 2 are arranged one by one. Through multiple matching clips 2 and fixed supports 1, the oil tank 5 can be reliably fixed in the hull 6.

[0053] The working process of the present invention is as follows: the fuel tank 5 is placed into the opening 3 from the first end 24 and the second end 25 into the clamping part 2, and the clamping part 2 is tightly fitted to the outer peripheral wall of the fuel tank 5 through the tightening ring 4, so that the clamping part 2 is tightly tightened on the outer peripheral wall of the fuel tank 5 to achieve fixed installation between the clamping part 2 and the fuel tank 5; the bottom of the clamping part 2 is provided with a plurality of outer protrusion structures 211 and inner protrusion structures 212, and all are embedded in the fixed support 1, so as to achieve reliable connection between the clamping part 2 and the fixed support 1, and finally the fuel tank 5 is fixed to the hull 6 through the fixed support 1 and the clamping part 2; when the fuel tank 5 needs to be disassembled and replaced, it is only necessary to remove the tightening ring 4 from the hook portion 22, and pull the first end 24 and the second end 25 with force to enlarge the opening 3 between the first end 24 and the second end 25, 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, an embodiment of the present invention provides a fuel tank fixing structure. In this solution, a clamping part 2 is sleeved on the outer wall of the fuel tank 5, and a protrusion 21 is provided at the bottom of the clamping part 2 in the direction away from the fuel tank 5. The protrusion 21 is embedded in a fixed support 1 fixedly installed with the hull 6, thereby avoiding the traditional method of fixing with bolts. When the fuel tank 5 is subjected to a large inertial force, the bolts are easy to loosen, resulting in an unreliable fixation of the fuel tank 5 and a large degree of shaking and displacement. In this solution, a protrusion 21 is provided at the bottom of the clamping part 2 and the protrusion 21 is embedded in the fixed support 1, so as to realize that the clamping part 2 is firmly fixed on the fixed support 1. The clamping part 2 is fixed to the outer wall of the fuel tank 5 by a tightening component, and finally the fuel tank 5 is fixedly installed on the fixed support 1.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A fuel tank fixing structure, characterized in that: include: A fixed support (1) fixedly mounted on the hull (6); A clamping member (2) is sleeved on the outer peripheral wall of the oil tank (5), and one side of the clamping member (2) has a tightening assembly, and the tightening assembly is used to sleeve and fix the clamping member (2) on the outer peripheral wall of the oil tank (5); The bottom portion of the clamping member (2) is deformed 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).

2. The fuel tank fixing structure according to claim 1, characterized in that: 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) comprises an outer protrusion structure (211) and an inner protrusion structure (212), and 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).

3. The fuel tank fixing structure according to claim 2, characterized in that: The outer protrusion structure (211) comprises a plurality of outer protrusions (2111) arranged at intervals, and the inner protrusion portion (21) comprises a plurality of inner protrusions (2121) arranged at intervals.

4. The fuel tank fixing structure according to claim 3, characterized in that: In the Z direction, the projection of the outer protrusion (2111) close to the end of the oil tank (5) is located within the projection range of the outer protrusion (2111) away from the end of the oil tank (5); In the Z direction, the projection of the inner protrusion (2121) close to one end of the oil tank (5) is located within the projection range of the inner protrusion (2121) away from one end of the oil tank (5).

5. The fuel tank fixing structure according to claim 3, characterized in that: The fixed support (1) has a through hole (11) extending through the fixed support (1) in 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).

6. The fuel tank fixing structure according to claim 5, characterized in that: The portion of the fixed support (1) located above the through hole (11) constitutes a supporting portion (12); In the Z direction, the thickness of the corresponding position of the support portion (12) and the outer protruding structure (211) is H, and the thickness of the corresponding position of the support portion (12) and the inner protruding structure (212) is h, and H>h.

7. The fuel tank fixing structure according to claim 1, characterized in that: One side of the clamping piece (2) is provided with an opening (3), the clamping piece (2) is provided with a hook portion (22) located above the opening (3), and the clamping piece (2) is provided with a fixing ring (23) located below the opening (3); The tightening assembly comprises a tightening ring (4), one end of the tightening ring (4) is inserted into the fixing ring (23), and the other end of the tightening ring (4) is hung on the hook portion (22).

8. The fuel tank fixing structure according to claim 7, characterized in that: The tightening ring (4) is an elastic structural component.

9. The fuel tank fixing structure according to claim 7, characterized in that: The clamping member (2) is a metal structural member, and the metal structural member has a first end (24) and a second end (25) arranged opposite to each other; The metal structure is bent around the outer peripheral wall of the oil tank (5) to form the clamping member (2), and the interval between the first end (24) and the second end (25) forms the opening (3); In the Z direction, the first end (24) is bent in a direction away from the opening (3) to form the hook portion (22); in the Z direction, the second end (25) is bent in a direction away from the opening (3) to form a bent portion, and one end of the bent portion away from the opening (3) is fixedly connected to the clamping member (2) to form the fixing ring (23).

10. The fuel tank fixing structure according to any one of claims 1 to 9, characterized in that: There are a plurality of the fixed supports (1), and the plurality of the fixed supports (1) are arranged at intervals along the X direction; The number of the clamping parts (2) matches the number of the fixed supports (1), and the fixed supports (1) and the clamping parts (2) are arranged in a one-to-one correspondence.

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