Motorcycle oil tank and motorcycle

Abstract

The invention relates to the field of camber beam motorcycles, in particular to a motorcycle fuel tank and a motor.The motorcycle fuel tank comprises a middle fuel tank arranged on an inclined section of a camber beam, and the middle fuel tank stretches across the two sides of the camber beam; the front end and the rear end of the middle oil tank are flexibly limited and fixed in a three-point supporting mode through a motorcycle storage box and a frame main beam, first fixing parts are arranged on the two sides of the middle oil tank, a second fixing part is arranged at the rear end of the middle oil tank, the middle oil tank stretches across the bent beam, and the middle oil tank is composed of special buffer rubber, a T-shaped lining and a fastening bolt. Support is provided through the frame main beam, stability is improved, and vibration is reduced; the first fixing parts on the two sides of the centrally-mounted oil tank are used for fixing the centrally-mounted oil tank to the camber beam, the second fixing part at the rear end of the centrally-mounted oil tank is used for installing the centrally-mounted oil tank to the camber beam from top to bottom, the gravity center of the whole vehicle is effectively lowered through the centrally-mounted oil tank, and the stability of the vehicle is improved.

Description

Technical Field

[0001] The invention relates to the field of curved beam motorcycles, and in particular to a motorcycle oil tank and a motorcycle. Background Art

[0002] As an economical, practical and easy-to-operate vehicle, underbone motorcycles have lower fuel consumption and are more durable than straddle motorcycles. They also have lower noise and are more comfortable to ride. They are deeply loved by consumers and occupy an important share in the market.

[0003] At present, the fuel tank of a curved beam motorcycle is mostly set between the seat of the curved beam motorcycle and the tail of the rear support rod of the frame. The fuel tank design is relatively limited and the fuel storage capacity of the fuel tank is also relatively small. Some existing designs place the fuel tank in the middle and place it across the curved beam to increase the fuel storage capacity. However, since this type of fuel tank is only fixed with bolts and curved beams at the rear end of the fuel tank, the stability of the fuel tank is poor. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a motorcycle fuel tank to solve the problem that the existing mid-mounted fuel tank has poor stability due to only bolts and bent beams being set at the rear end of the fuel tank for fixing.

[0005] To achieve the above-mentioned purpose, the present invention provides a motorcycle fuel tank, including a center fuel tank arranged on the inclined section of a curved beam, the center fuel tank spanning across both sides of the curved beam; the rear end of the center fuel tank is supported and limited left and right by a motorcycle storage box, and a first fixing part is arranged on both sides of the center fuel tank, one end of the first fixing part is fixedly connected to the center fuel tank, and the other end rests on the curved beam, and the first fixing part can support the center fuel tank.

[0006] The principle of the technical solution is as follows: the curved beam is a connecting beam between the front wheel and the rear wheel of a motorcycle. Usually, the curved beam includes an inclined section, a smooth section and a horizontal section. The central fuel tank spans the inclined section of the curved beam, which can prevent all the weight from being pressed on the curved beam and reduce the service life of the curved beam; the rear end of the central fuel tank is close to the end of the motorcycle seat, and the rear end of the central fuel tank cooperates with the storage box under the rear seat of the motorcycle, and can be against the storage box, and the storage box provides support to prevent the central fuel tank from sliding down along the curved beam; during driving, the motorcycle shakes up and down, which can easily loosen the central fuel tank, but the storage box bears the weight of the seat and the human body, is more stable, and can effectively provide support for the central fuel tank; at the same time, the storage box also plays a role in limiting the left and right positions of the central fuel tank; the first fixing parts on both sides of the central fuel tank are used to hold the central fuel tank against the curved beam to limit the left and right positions of the central fuel tank.

[0007] Compared with the prior art, the beneficial effects of the present invention are: 1. The center fuel tank in the present invention is located on the inclined section of the motorcycle's curved beam, and the main weight acts on the curved beam. Part of the weight is supported by the storage box, which can increase the service life of the curved beam. At the same time, the storage box can limit the left and right positions of the rear end of the center fuel tank, and cooperate with the two first fixing parts to effectively fix the left and right positions of the center fuel tank, thereby improving the stability of the center fuel tank.

[0008] 2. After the fuel tank is placed in the middle, the center of gravity of the motorcycle is moved forward to balance the weight of the human body, so that the center of gravity is close to the center of the motorcycle, thereby improving stability during driving.

[0009] 3. After the fuel tank is placed in the middle, the capacity of the storage box under the rear seat of the motorcycle can also be increased to accommodate more items.

[0010] 4. After the fuel tank is placed in the middle, it is not restricted by the seat and the rear support rod of the frame, so the capacity can be effectively increased. The fuel capacity of a common underbone motorcycle is 3 to 4 liters, and after the middle position, the fuel tank capacity can be increased to 6 liters.

[0011] As a preferred embodiment of the present invention, an extension portion is provided at the rear end of the center fuel tank, and a groove is provided in the extension portion. The groove is engaged with the front end of the motorcycle storage box, so that the center fuel tank can be supported by the motorcycle storage box and limited to the left and right.

[0012] The principle of the technical solution is as follows: the extension of the center fuel tank is provided with the groove which is sunken inwards, and the storage box is convex outwards, and the two are engaged with each other; the curved beam is arranged at an angle in the motorcycle, and the storage box can provide support for the center fuel tank, limit the front and rear positions of the center fuel tank, and prevent the center fuel tank from moving backwards along the length direction of the curved beam, and at the same time, the two are engaged with each other, and can limit the left and right positions of the center fuel tank; at the same time, the extension expands the volume of the center fuel tank and can increase the oil storage tank.

[0013] As a preferred embodiment of the present invention, the extension portion is upwardly curved from the front end to the rear end of the motorcycle.

[0014] Principle of the technical solution: the extension portion is in an upward shape, which allows the storage box to provide support for the center fuel tank while applying an oblique downward force to the center fuel tank, so that the center fuel tank is pressed against the curved beam to improve stability.

[0015] As a preferred embodiment of the present invention, the first fixing portion includes a mounting sleeve clamped in the center fuel tank, a connecting piece is passed through the mounting sleeve, a supporting piece is arranged on the inner side of the connecting piece, one end of the mounting sleeve abuts against the connecting piece, and the other end abuts against one end of the supporting piece, and the other end of the supporting piece abuts against the bending beam; a fixing piece is arranged on the connecting piece, and the fixing piece fixes the connecting piece and the supporting piece.

[0016] Beneficial effect: the connecting piece is connected to the supporting piece and the fixing piece in sequence, one side of the supporting piece is against the curved beam, and when the connecting piece, the mounting sleeve and the supporting piece are tightly pressed, the supporting piece can be against the curved beam to fix the central fuel tank from the side and improve stability; the supporting pieces on both sides cooperate to limit the left and right positions of the front end of the central fuel tank, and the storage box limits the left and right positions of the rear end of the central fuel tank, and the two are snap-fitted to effectively fix the left and right positions of the central fuel tank on the curved beam.

[0017] As a preferred embodiment of the present invention, a support block is fixed to the upper end of the abutting member for supporting the central oil tank, or the upper part of the abutting member is used to support the central oil tank.

[0018] Beneficial effect: The supporting members on both sides of the curved beam are provided with the supporting blocks for supporting the central fuel tank, sharing the pressure on the curved beam and making the central fuel tank more stable; or the supporting members can be used to directly support the central fuel tank.

[0019] As a preferred embodiment of the present invention, a reinforcing rib is fixed on the curved beam, and the rear end of the reinforcing rib is in contact with the abutting member to limit the abutting member along the length direction of the curved beam.

[0020] Beneficial effect: The reinforcing rib is used to increase the strength of the curved beam, and the rear end of the reinforcing rib contacts the supporting member, so that the supporting member cannot move toward the front end along the curved beam, and the rear end is restricted by the storage box, so that the center fuel tank cannot move forward and backward along the curved beam, and the installation is more stable.

[0021] As a preferred embodiment of the present invention, a fixing groove is provided in the extension portion, and a second fixing portion is provided in the fixing groove for connecting the rear end of the center fuel tank with the curved beam.

[0022] Beneficial effect: the fixing bolt is vertically arranged, passes through the gasket and is threadedly connected to the curved beam, so that the rear end of the center fuel tank can be quickly and effectively installed on the curved beam, thereby improving stability.

[0023] As a preferred embodiment of the present invention, a cover is provided on the outer side of the center fuel tank, and the cover is snap-fitted with the center fuel tank.

[0024] Beneficial effect: The cover is installed to the outside of the center fuel tank by screws, which can effectively cover and protect the center fuel tank to avoid collision damage, etc.

[0025] As a preferred embodiment of the present invention, the central oil tank includes a first oil storage chamber and a second oil storage chamber arranged on both sides of the curved beam, the first oil storage chamber and the second oil storage chamber are connected through a connecting oil storage chamber, the connecting oil storage chamber is flat and spans above the curved beam, the main parts of the first oil storage chamber and the second oil storage chamber are located on the front side of the curved beam, and the first oil storage chamber and the second oil storage chamber are symmetrically arranged; an oil filling port is arranged at the highest position of the first oil storage chamber, and a sealing cover is connected to the oil filling port.

[0026] Beneficial effects: the first oil storage chamber and the second oil storage chamber are respectively located on both sides of the curved beam, and the tops thereof are connected to the connecting oil storage chamber, allowing the fuel to move freely therein, and facilitating addition and outflow; the connecting oil storage chamber is flat, reducing the protruding part on the top, which can effectively lower the center of gravity; at the same time, the first oil storage chamber and the second oil storage chamber on both sides are symmetrically arranged, and with the curved beam as the axis of symmetry, they can play a balancing role and improve the stability of the vehicle during driving; the main parts of the first oil storage chamber and the second oil storage chamber are both located on the front side of the curved beam, which can move the overall center of gravity of the motorcycle forward, balance the weight of the driver, and make the entire motorcycle more stable; at the same time, the two are symmetrical, located on both sides of the curved beam, with the curved beam as the center, forming a balanced structure, which makes the left and right of the motorcycle more stable; the central fuel tank is installed on the curved beam, and is tilted as a whole. The oil filling port is located at its highest point, which is used to add fuel to increase the effective capacity.

[0027] The second object of the present invention is to provide a motorcycle, which adopts the motorcycle fuel tank and also includes a curved beam, a storage box and a covering member, wherein the motorcycle fuel tank is arranged on the curved beam, the storage box is arranged at the rear end of the motorcycle fuel tank, and the covering member is arranged on the outer sides of the motorcycle fuel tank and the storage box.

[0028] Beneficial effects: The curved beam is a common curved beam motorcycle main beam, the motorcycle fuel tank is arranged above it, the storage box is used to contain items, the covering is used to wrap and protect the motorcycle fuel tank and the storage box, the motorcycle fuel tank is moved from under the seat to the curved beam, the center of gravity is lowered and moved forward, the stability is effectively improved, and space is left at the same time, so that the capacity of the storage box is increased to facilitate the storage of more goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0030] Figure 1 It is a structural schematic diagram of a motorcycle fuel tank of the present invention.

[0031] Figure 2It is a top view of the motorcycle fuel tank of the present invention.

[0032] Figure 3 It is a bottom view of the motorcycle fuel tank of the present invention.

[0033] Figure 4 The motorcycle fuel tank of the present invention Figure 3 A partial enlargement of detail A.

[0034] Figure 5 It is a structural schematic diagram of the first fixing part of the motorcycle fuel tank of the present invention.

[0035] Figure 6 The front view of the motorcycle fuel tank of the present invention hiding the central fuel tank.

[0036] The reference numerals in the drawings of the specification include: 1 curved beam, 2 central oil tank, 21 first oil storage chamber, 22 second oil storage chamber, 23 connecting oil storage chamber, 3 extension portion, 31 groove, 32 fixing groove, 4 first fixing portion, 41 connecting member, 42 mounting sleeve, 43 supporting member, 44 fixing member, 45 supporting block, 5 second fixing portion, 51 gasket, 52 fixing bolt, 6 oil filling port, 7 cover, 8 reinforcing rib. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0041] Embodiment 1 In this embodiment, the “front end” and “rear end” are based on the motorcycle, and the front end is closer to the front wheel of the motorcycle.

[0042] As attached Figure 1 As shown, the present invention provides a motorcycle fuel tank: comprising a central fuel tank 2 arranged on the inclined section of a curved beam 1, the central fuel tank 2 spanning across the two sides of the curved beam 1; the rear end of the central fuel tank 2 is supported and limited left and right by a motorcycle storage box, specifically, an extension portion 3 is provided at the rear end of the central fuel tank 2, a groove 31 is provided in the extension portion, the groove 31 is engaged with the front end of the motorcycle storage box, so that the central fuel tank 2 can be supported by the motorcycle storage box, the extension portion is upwardly tilted from the front end to the rear end of the motorcycle; the central fuel tank 2 spans over the curved beam 1, The extending portion 3 of the center fuel tank 2 is provided with the groove 31 which is concave inwards, and the storage box is convex outwards, and the two are engaged with each other; the curved beam 1 is arranged at an angle in the motorcycle, and the storage box can provide support for the center fuel tank 2, limit the front and rear positions of the center fuel tank 2, prevent the center fuel tank 2 from moving backward along the length direction of the curved beam 1, and limit the left and right positions of the center fuel tank 2 at the same time; the extending portion 3 is arranged at an angle, so that the storage box can provide support for the center fuel tank 2 while applying an oblique downward force to it, so that the center fuel tank 2 is pressed against the curved beam 1 to improve stability.

[0043] As attached Figure 1 , Figure 3~Figure 5As shown, in this embodiment, first fixing parts 4 are provided on both sides of the center fuel tank 2, and the first fixing parts 4 are used to press the center fuel tank 2 against the curved beam 1 from both sides and support the center fuel tank 2; the first fixing part 4 adopts a T-shaped bushing, specifically, the first fixing part 4 includes a mounting sleeve 42 clamped in the center fuel tank 2, a connecting member 41 is passed through the mounting sleeve 42, a supporting member 43 is provided on the inner side of the connecting member 41, one end of the mounting sleeve 42 presses against the connecting member 41, and the other end presses against one end of the supporting member 43, and the other end of the supporting member 43 presses against the curved beam; a fixing member 44 is provided on the connecting member 41, and the fixing member 44 is provided on the connecting member 41. The fixing member 44 fixes the connecting member 41 and the supporting member 43. The connecting member 41 is threadedly connected with the mounting sleeve 42, the supporting member 43 and the fixing member 44 in sequence. One side of the supporting member 43 is against the curved beam 1. When the connecting member 41, the mounting sleeve 42 and the supporting member 43 are tightly pressed, the supporting member 43 can be pressed against the curved beam 1 to fix the center fuel tank 2 from the side and improve stability. The supporting members 43 on both sides can also limit the left and right positions of the front end of the center fuel tank 2, and the storage box limits the left and right positions of the rear end of the center fuel tank 2. The two are snap-fitted to effectively fix the left and right positions of the center fuel tank 2 on the curved beam 1.

[0044] As attached Figure 6 As shown, in the present embodiment, a support block 45 is fixed to the upper end of the abutment 43 for supporting the center fuel tank 2; the abutment 43 on both sides of the curved beam 1 are provided with the support blocks 45 for supporting the center fuel tank 2, sharing the pressure on the curved beam 1, and making the center fuel tank 2 more stable; or the abutment 43 can be used to directly support the center fuel tank 2; in addition, a reinforcing rib 8 is fixed to the curved beam 1, and the rear end of the reinforcing rib 8 contacts the abutment 43 to limit the abutment 43 along the length direction of the curved beam 1; the reinforcing rib 8 is used to increase the strength of the curved beam 1, and the rear end of the reinforcing rib 8 contacts the abutment 43, so that the abutment 43 cannot move toward the front end along the curved beam 1, and the rear end is restricted by the storage box, so that the center fuel tank 2 cannot move forward and backward along the curved beam 1, and the installation is more stable.

[0045] In this embodiment, the connecting member 41 includes a bolt head, a cylindrical portion and a threaded portion, wherein the cylindrical portion is solid and has a diameter larger than the threaded portion. The cylindrical portion is used to bear the main weight of the central oil tank 2 and is passed through the mounting sleeve 42. Compared with traditional screws, the connecting member 41 of this embodiment has a higher load-bearing capacity and can better bear the main weight of the central oil tank 2. At the same time, it is closely clamped with the mounting sleeve 42 to avoid shaking and improve stability.

[0046] As attached Figure 2 As shown, in the present embodiment, a fixing groove 32 is provided in the extension portion 3, and a second fixing portion 5 is provided at the rear end of the fixing groove 32 for connecting the rear end of the center fuel tank 2 and the curved beam 1. The specific structure in the present embodiment is as follows: the second fixing portion 5 includes a gasket 51 and a fixing bolt 52, the gasket 51 adopts a special buffer rubber, the fixing bolt 52 is vertically arranged in the fixing groove 32, and the fixing bolt 52 passes through the gasket 51 and is threadedly connected to the curved beam 1; the fixing bolt 52 is vertically arranged, passes through the gasket 51 and is threadedly connected to the curved beam 1, and can quickly and effectively install the rear end of the center fuel tank 2 on the curved beam 1 to improve stability.

[0047] As attached Figure 2 As shown, in the present embodiment, the central oil tank 2 comprises a first oil storage chamber 21 and a second oil storage chamber 22 arranged on both sides of the curved beam 1, the first oil storage chamber 21 and the second oil storage chamber 22 are connected via a connecting oil storage chamber 23, the connecting oil storage chamber 23 is flat and spans over the curved beam 1, the main parts of the first oil storage chamber 21 and the second oil storage chamber 22 are located on the front side of the curved beam 1, and the first oil storage chamber 21 and the second oil storage chamber 22 are symmetrically arranged; a fuel filling port 6 is provided at the highest position of the first oil storage chamber 21, and a sealing cover 7 is connected to the fuel filling port 6; the first oil storage chamber 21 and the second oil storage chamber 22 are respectively located on both sides of the curved beam 1, and the tops thereof are connected to the connecting oil storage chamber 23, so that the fuel can move freely therein, which is convenient for adding and outflow; the connecting oil storage chamber 23 is flat, reducing the protruding part on the top, which can effectively lower the center of gravity. At the same time, the first oil storage chamber 21 and the second oil storage chamber 22 on both sides are symmetrically arranged, and with the curved beam 1 as the axis of symmetry, they can play a balancing role and improve the stability of the vehicle during driving. The main parts of the first oil storage chamber 21 and the second oil storage chamber 22 are both located on the front side of the curved beam 1, which can move the overall center of gravity of the motorcycle forward, balance the weight of the driver, and make the entire motorcycle more stable. At the same time, the two are symmetrical and are located on both sides of the curved beam 1, with the curved beam 1 as the center, forming a balanced structure, which makes the left and right of the motorcycle more stable; the central fuel tank 2 is installed on the curved beam 1, and is tilted as a whole. The oil filling port 6 is located at its highest point, which is used to add fuel to increase the effective capacity.

[0048] In this embodiment, a covering member is provided on the outer side of the center fuel tank 2, and the covering member and the center fuel tank 2 are snap-fitted together. The covering member is installed to the outside of the center fuel tank 2 by screws, and can effectively cover and protect the center fuel tank 2 to avoid collision damage, etc.

[0049] In this embodiment, along the length direction of the curved beam 1: the front end of the center fuel tank 2 is restricted by the abutting piece 43 of the first fixing portion 4, and the front end of the abutting piece 43 is provided with the reinforcing rib 8, and the reinforcing rib 8 can abut the abutting piece 43, thereby preventing the center fuel tank from moving forward along the curved beam 1; and the rear end of the center fuel tank 2 is fixed to the curved beam 1 by the fixing bolts 52 of the second fixing portion 5, and is also supported by the storage box, and the groove 31 provided on the extension portion 3 is engaged with the storage box, so that the center fuel tank cannot move backward along the curved beam 1.

[0050] Along the width direction of the curved beam 1 (i.e., the left and right positions of the curved beam): the front end of the central fuel tank 2 is restricted by the first fixing parts 4 on both sides, and the rear end is restricted by the snap-fitting of the groove 31 and the storage box.

[0051] In summary, the multiple structures of the present invention cooperate with each other to effectively restrict the front-to-back and left-to-right directions of the center fuel tank 2, so that the installation of the center fuel tank 2 is more stable.

[0052] In this embodiment, the curved beam 1 is tilted in the motorcycle, and the center fuel tank 2 is arranged on the curved beam, which can prevent all gravity from being pressed on the curved beam 1, and can increase the service life of the curved beam 1; since the curved beam 1 is tilted, the center fuel tank 2 has a tendency to move downward, and the groove 31 of the extension part 3 is connected to the storage box, and there is a seat above the storage box, and the occupant sits on it. The whole is relatively stable, which can effectively provide support for the center fuel tank 2.

[0053] In this embodiment, the central oil tank 2 is made by rotational molding. The articles made by rotational molding have excellent negative pressure resistance and corrosion resistance, and can effectively improve the explosion-proof performance of the oil tank.

[0054] Embodiment 2 As attached Figure 1 As shown: On the basis of the first embodiment, a motorcycle of the present invention adopts the motorcycle fuel tank, and also includes a curved beam 1, a storage box and a covering member, wherein the motorcycle fuel tank is arranged on the curved beam 1, and the storage box is arranged at the rear end of the motorcycle fuel tank, and the covering member is arranged on the outer sides of the motorcycle fuel tank and the storage box; the curved beam 1 is a common curved beam motorcycle main beam, and the motorcycle fuel tank is arranged above it, and the storage box is used to accommodate articles, and the covering member is used to wrap and protect the motorcycle fuel tank and the storage box, and the motorcycle fuel tank is moved from under the seat to the curved beam 1, which lowers the center of gravity and moves the center of gravity forward, effectively improving stability, while leaving space to increase the capacity of the storage box for storing more goods.

[0055] The preferred implementation modes of the present application are described in detail above in conjunction with the accompanying drawings. Typical known structures and common knowledge technologies in the preferred implementation modes are not described in detail here. Ordinary technicians in the relevant field can improve and implement the technical solutions of the present invention based on their own abilities under the inspiration given by the present implementation modes. Some typical known structures, known methods or common knowledge technologies should not become obstacles for ordinary technicians in the relevant field to implement the present application.

[0056] The scope of protection required by this application shall be based on the contents of its claims, and the contents recorded in the invention content, specific implementation methods and drawings of the specification shall be used to interpret the claims.

[0057] Within the technical concept of the present application, several modifications may be made to the specific implementation methods of the present application, and these modified specific implementation methods should also be regarded as within the protection scope of the present application.

Claims

1. A motorcycle fuel tank, characterized in that: It includes a center fuel tank arranged on the inclined section of the curved beam, the center fuel tank spans across the two sides of the curved beam; the rear end of the center fuel tank is supported and limited to the left and right by a motorcycle storage box, and first fixing parts are arranged on both sides of the center fuel tank, one end of the first fixing part is fixedly connected to the center fuel tank, and the other end rests on the curved beam, and the first fixing part can support the center fuel tank.

2. The motorcycle fuel tank according to claim 1, characterized in that: An extension portion is provided at the rear end of the center fuel tank, and a groove is provided in the extension portion. The groove is engaged with the front end of the motorcycle storage box, so that the center fuel tank can be supported and limited left and right by the motorcycle storage box.

3. The motorcycle fuel tank according to claim 2, characterized in that: The extension part is in an upward shape from the front end to the rear end of the motorcycle.

4. The motorcycle fuel tank according to claim 1, characterized in that: The first fixing part includes a mounting sleeve clamped in the center oil tank, a connecting piece is passed through the mounting sleeve, a supporting piece is arranged inside the connecting piece, one end of the mounting sleeve is against the connecting piece, and the other end is against one end of the supporting piece, and the other end of the supporting piece is against the bending beam; a fixing piece is arranged on the connecting piece, and the fixing piece fixes the connecting piece and the supporting piece.

5. The motorcycle fuel tank according to claim 4, characterized in that: A support block is fixed on the upper end of the abutting member for supporting the middle oil tank, or the upper part of the abutting member is used to support the middle oil tank.

6. The motorcycle fuel tank according to claim 5, characterized in that: A reinforcing rib is fixed on the curved beam, and the rear end of the reinforcing rib contacts the supporting member to limit the supporting member along the length direction of the curved beam.

7. The motorcycle fuel tank according to claim 2, characterized in that: A fixing groove is arranged in the extension part, and a second fixing part is arranged in the fixing groove for connecting the rear end of the center oil tank with the curved beam.

8. The motorcycle fuel tank according to claim 1, characterized in that: A covering piece is arranged on the outer side of the center fuel tank, and the covering piece is snap-fitted with the center fuel tank.

9. The motorcycle fuel tank according to claim 1, characterized in that: The central oil tank includes a first oil storage chamber and a second oil storage chamber arranged on both sides of the curved beam, the first oil storage chamber and the second oil storage chamber are connected by a connecting oil storage chamber, the connecting oil storage chamber is flat and spans above the curved beam, the main parts of the first oil storage chamber and the second oil storage chamber are located on the front side of the curved beam, and the first oil storage chamber and the second oil storage chamber are symmetrically arranged; an oil filling port is arranged at the highest position of the first oil storage chamber, and a sealing cover is connected to the oil filling port.

10. A motorcycle, characterized in that: The motorcycle fuel tank as described in any one of claims 1 to 9 further includes a curved beam, a storage box and a covering member, wherein the motorcycle fuel tank is arranged on the curved beam, the storage box is arranged at the rear end of the motorcycle fuel tank, and the covering member is arranged on the outer sides of the motorcycle fuel tank and the storage box.

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