Plastic fuel tank and vehicle chassis

Abstract

The utility model relates to the technical field of vehicles, in particular to a plastic fuel tank and a vehicle chassis, the plastic fuel tank comprises a fuel tank body, a fuel storage structure and a fuel suction pipe, the bottom wall of the fuel tank body is sequentially divided into a horizontal bottom wall and a slope bottom wall in the first horizontal direction, and the slope bottom wall inclines towards the direction close to the top wall of the fuel tank body; the oil storage structure is arranged on the horizontal bottom wall, the two ends of the oil storage structure extend towards the two side walls which are close to the oil tank body and extend in the first horizontal direction, and an oil storage groove is defined by the oil storage structure and the slope bottom wall. And the oil suction pipe extends into the oil storage tank. When the fuel quantity in the plastic fuel tank is insufficient and the plastic fuel tank inclines along the first horizontal direction, the plastic fuel tank avoids the problem that fuel cannot be continuously and stably supplied due to empty suction of an oil suction path. When the plastic fuel tank needs to be replaced and maintained, the fuel tank body can be taken down from the downward opening of the mounting cavity only by separating the tray from the frame, parts above the frame do not need to be disassembled, and the maintenance convenience is higher.

Description

[0001] This application claims the priority of patent application number 2024211711788 (the filing date of the prior application is May 27, 2024, and the utility model name is plastic fuel tank and vehicle chassis). Technical Field

[0002] The utility model relates to the technical field of vehicles, in particular to a plastic fuel tank and a vehicle chassis. Background Art

[0003] Plastic fuel tanks are widely used because they are easy to shape, have low manufacturing costs, and can be formed into complex shapes to fit into limited installation space inside machines.

[0004] During daily driving, vehicles usually pass through climbing and downhill sections. When the vehicle passes these sections with insufficient fuel, the fuel will flow to the lower position in the plastic fuel tank, which can easily cause the oil suction line to be empty and the fuel cannot be supplied continuously and stably.

[0005] In the prior art, when disassembling and assembling a plastic fuel tank for maintenance, it is usually necessary to remove the components above the plastic fuel tank (such as the engine) from the vehicle frame before the plastic fuel tank can be removed, which results in poor maintenance convenience. Utility Model Content

[0006] The purpose of the utility model is to provide a plastic fuel tank and a vehicle chassis so as to solve the problem in the related art that when a vehicle passes through a rugged road section with insufficient fuel, the fuel will flow to a lower position in the plastic fuel tank, which may easily cause the oil suction line to be empty and the fuel cannot be supplied continuously and stably, and the problem of poor user convenience when disassembling and assembling the plastic fuel tank for maintenance.

[0007] In one aspect, the utility model provides a plastic fuel tank, which comprises:

[0008] A fuel tank body, wherein the bottom wall of the fuel tank body is sequentially divided into a horizontal bottom wall and a sloped bottom wall along a first horizontal direction, and the sloped bottom wall is inclined toward a top wall of the fuel tank body;

[0009] An oil storage structure, the oil storage structure is arranged on the horizontal bottom wall, the two ends of the oil storage structure respectively extend toward two side walls extending along the first horizontal direction close to the oil tank body, and the oil storage structure and the slope bottom wall are surrounded to form an oil storage tank;

[0010] An oil suction pipe extends into the oil storage tank.

[0011] As a preferred technical solution for the plastic fuel tank, the oil storage structure is an arc-shaped structure, and the opening of the oil storage structure is opposite to the slope bottom wall.

[0012] As a preferred technical solution for the plastic fuel tank, the oil storage structure is formed by the horizontal bottom wall being recessed toward the inside of the tank body.

[0013] As a preferred technical solution for the plastic fuel tank, both ends of the oil storage structure are arc-shaped.

[0014] As a preferred technical solution for the plastic fuel tank, the horizontal bottom wall and / or the sloped bottom wall is provided with convex ribs extending along a second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction.

[0015] As a preferred technical solution of the plastic fuel tank, it also includes a connecting pipe, which is located in the fuel tank body, and the two ends of the connecting pipe are respectively fixed to the bottom wall of the fuel tank body and the top wall of the fuel tank body.

[0016] On the other hand, the utility model provides a vehicle chassis, comprising a frame, a tray and a plastic fuel tank in any of the above schemes, wherein the frame is provided with a mounting cavity with an opening facing downward, the fuel tank body is fixed to the tray, the fuel tank body extends into the mounting cavity from the opening, and the tray is fixed to the frame and closes the opening.

[0017] As a preferred technical solution of the vehicle chassis, the plastic fuel tank further includes a connecting pipe, the connecting pipe is located in the fuel tank body, the two ends of the connecting pipe are respectively fixed to the bottom wall of the fuel tank body and the top wall of the fuel tank body, the bottom wall of the fuel tank body and the top wall of the fuel tank body are respectively provided with a first through hole and a second through hole, the first through hole and the second through hole are respectively communicated with the connecting pipe;

[0018] The vehicle chassis also includes a first fastener, which is sequentially inserted into the first through hole, the connecting pipe, the second through hole and the tray, one end of the first fastener abuts against the outer side of the top wall of the fuel tank body, and the other end abuts against a side of the tray away from the fuel tank body.

[0019] As an optimal technical solution for the vehicle chassis, the first fastener includes a first bolt, a rubber sleeve, a connecting rod and a second bolt, the two ends of the connecting rod are respectively provided with a first threaded hole and a second threaded hole, the connecting rod is inserted in the connecting pipe, the first bolt passes through the rubber sleeve and is screwed with the hole wall of the first threaded hole to abut the rubber sleeve against the outer side of the top wall of the fuel tank body, the second bolt passes through the tray and is screwed with the hole wall of the second threaded hole to abut the screw head of the second bolt against the side of the tray away from the fuel tank body.

[0020] As a preferred technical solution of the vehicle chassis, the tray is provided with a guide member, and the guide member extends in a vertical direction;

[0021] The outer peripheral wall of the oil tank body is provided with a guide groove, and the guide member is inserted into the guide groove.

[0022] As a preferred technical solution for the vehicle chassis, the guide member is fixedly connected to the vehicle frame so that the tray is fixedly connected to the vehicle frame.

[0023] As a preferred technical solution for the vehicle chassis, a limiting groove is recessed on the outer side of the top wall of the fuel tank body, and the limiting groove extends along a second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction;

[0024] The vehicle chassis also includes a second fastener, which is disposed in the limiting groove and fixedly connected to the vehicle frame.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a plastic fuel tank and a vehicle chassis, the plastic fuel tank comprising a fuel tank body, an oil storage structure and an oil suction pipe, the vehicle frame is provided with a mounting cavity with an opening facing downward, the fuel tank body is fixedly arranged on a tray, the fuel tank body extends into the mounting cavity from the opening, the tray is fixedly connected to the vehicle frame and closes the opening. When the plastic fuel tank needs to be replaced and maintained, it is only necessary to separate the tray from the chassis, and the fuel tank body can be removed from the opening of the mounting cavity facing downward, without disassembling the components above the vehicle frame, so the plastic fuel tank can be quickly disassembled and assembled, and the maintenance convenience is high.

[0027] The bottom wall of the fuel tank body is divided into a horizontal bottom wall and a sloped bottom wall in sequence along the first horizontal direction, and the sloped bottom wall is inclined toward the top wall of the fuel tank body; the oil storage structure is arranged on the horizontal bottom wall, and the two ends of the oil storage structure extend toward the two side walls extending along the first horizontal direction close to the fuel tank body, respectively, and the oil storage structure and the sloped bottom wall are arranged to form an oil storage tank; the oil suction pipe extends into the oil storage tank. After the plastic fuel tank is installed on the vehicle chassis, the first horizontal direction is the running direction of the vehicle. When the vehicle climbs a slope, the oil storage structure will prevent part of the fuel from moving in the direction away from the sloped bottom wall, and then limit the part of the fuel in the oil storage tank, so that the oil suction pipe in the oil storage tank will not have empty suction phenomenon; when the vehicle goes downhill, because the sloped bottom wall is inclined toward the top wall of the fuel tank body, when the vehicle goes downhill, part of the fuel will still remain in the oil storage tank surrounded by the sloped bottom wall and the oil storage structure, so that the oil suction pipe in the oil storage tank will not have empty suction phenomenon. Therefore, when the amount of oil in the plastic fuel tank is insufficient and the plastic fuel tank itself is tilted along the first horizontal direction, the plastic fuel tank avoids the problem of empty suction of the oil suction line and the inability to continuously and stably supply fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a plastic fuel tank in an embodiment of the utility model;

[0029] Figure 2 The cross-sectional view of the plastic fuel tank in the embodiment of the utility model Figure 1 ;

[0030] Figure 3 The cross-sectional view of the plastic fuel tank in the embodiment of the utility model Figure 2 ;

[0031] Figure 4 It is a structural schematic diagram of the vehicle chassis in the embodiment of the utility model (including the frame and the tray);

[0032] Figure 5 It is an exploded view of the vehicle chassis (including the tray) in the embodiment of the utility model.

[0033] In the figure:

[0034] X, first horizontal direction; Y, second horizontal direction; Z, vertical direction;

[0035] 1. Oil tank body; 11. Horizontal bottom wall; 12. Sloped bottom wall; 121. First slope; 122. Horizontal connecting surface; 123. Second slope; 13. Raised rib; 14. First through hole; 15. Second through hole; 16. Guide groove; 17. Limiting groove;

[0036] 2. Oil storage structure; 21. Oil storage tank; 3. Oil suction pipe; 4. Connecting pipe; 5. Tray; 51. Guide piece;

[0037] 6. first fastener; 61. first bolt; 62. first gasket; 63. first metal sleeve; 64. rubber sleeve; 65. connecting rod; 66. second metal sleeve; 67. second gasket; 68. second bolt;

[0038] 7. Second fastener; 8. Third fastener; 9. Vehicle frame. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] like Figure 1 to Figure 3As shown, the present embodiment provides a plastic fuel tank, which includes a tank body 1, an oil storage structure 2 and an oil suction pipe 3. The bottom wall of the tank body 1 is divided into a horizontal bottom wall 11 and a sloped bottom wall 12 in sequence along a first horizontal direction X, and the sloped bottom wall 12 is inclined toward the top wall of the tank body 1; the oil storage structure 2 is arranged on the horizontal bottom wall 11, and the two ends of the oil storage structure 2 respectively extend toward two side walls extending along the first horizontal direction X close to the tank body 1, and the oil storage structure 2 and the sloped bottom wall 12 are arranged to form an oil storage tank 21; the oil suction pipe 3 extends into the oil storage tank 21. After the plastic fuel tank is installed on the chassis of the vehicle, the first horizontal direction X is the direction of travel of the vehicle. When the vehicle climbs a slope, the oil storage structure 2 will prevent part of the fuel from moving in the direction away from the slope bottom wall 12, thereby limiting the part of the fuel in the oil storage tank 21, so that the oil suction pipe 3 located in the oil storage tank 21 will not be sucked empty; when the vehicle goes downhill, since the slope bottom wall 12 is inclined toward the top wall of the tank body 1, when the vehicle goes downhill, part of the fuel will still remain in the oil storage tank 21 surrounded by the slope bottom wall 12 and the oil storage structure 2, so that the oil suction pipe 3 located in the oil storage tank 21 will not be sucked empty. Therefore, when the amount of fuel in the plastic fuel tank is insufficient and the plastic fuel tank itself is tilted along the first horizontal direction X, the plastic fuel tank avoids the problem of empty suction of the oil suction circuit and the inability to continuously and stably supply fuel.

[0044] Optionally, the oil storage structure 2 can also serve as a wave-proof structure to reduce the sloshing of the fuel in the fuel tank body 1 .

[0045] Optionally, the oil storage structure 2 is an arc-shaped structure, and the opening of the oil storage structure 2 is opposite to the slope bottom wall 12. In this embodiment, the above arrangement can increase the oil storage space of the oil storage tank 21, so that more fuel can be temporarily stored in the oil storage tank 21, and can reduce stress concentration on the other hand, so as to avoid damage to the vicinity of the oil storage structure 2 due to greater stress when the fuel tank body 1 is subjected to stress. In other embodiments, the oil storage structure 2 can also be V-shaped, U-shaped, or straight-shaped.

[0046] Optionally, the oil storage structure 2 is formed by the horizontal bottom wall 11 being recessed into the fuel tank body 1. In this embodiment, the fuel tank body 1 is made by rotational molding, injection molding or blow molding. Therefore, when the fuel tank body 1 is produced, the oil storage structure 2 and the fuel tank body 1 are integrally formed. This arrangement can reduce the overall weight of the plastic fuel tank on the one hand, and save manufacturing costs on the other hand.

[0047] Optionally, the oil storage structure 2 and the fuel tank body 1 are integrally formed, which can reduce the risk of leakage at the connection between the fuel tank body 1 and the oil storage structure 2 .

[0048] Optionally, both ends of the oil storage structure 2 are in arc shape. In this embodiment, this arrangement can reduce the stress concentration of the oil tank body 1 at the end of the oil storage structure 2 and improve the durability of the oil tank body 1.

[0049] Optionally, the horizontal bottom wall 11 and / or the sloped bottom wall 12 are provided with convex ribs 13 extending along the second horizontal direction Y, and the first horizontal direction X is perpendicular to the second horizontal direction Y. In this embodiment, a plurality of convex ribs 13 are provided, and the plurality of convex ribs 13 are arranged on the bottom plate of the fuel tank body 1 at intervals along the first horizontal direction X. The above arrangement can improve the overall strength of the fuel tank body 1 and improve the maximum deformation force that the fuel tank body 1 can withstand. Specifically, the convex rib 13 is a long strip structure, and the convex rib 13 is formed by a concave arrangement of the bottom wall of the fuel tank body 1. In other embodiments, the convex rib 13 can be fixed on the bottom wall of the fuel tank body 1.

[0050] Optionally, the plastic fuel tank further includes a connecting pipe 4, which is located in the fuel tank body 1, and the two ends of the connecting pipe 4 are respectively fixed to the bottom wall of the fuel tank body 1 and the top wall of the fuel tank body 1. In this embodiment, when the air pressure in the fuel tank body 1 is too high, or the bottom wall and the top wall of the fuel tank body 1 are brought close to or away from each other due to the impact of the fuel, the connecting pipe 4 can support and limit the bottom wall and the top wall of the fuel tank body 1, thereby preventing the fuel tank body 1 from being damaged due to deformation.

[0051] Specifically, the oil tank body 1 and the connecting pipe 4 are integrally formed.

[0052] like Figure 4 and Figure 5 As shown, the present embodiment further provides a vehicle chassis, including a frame 9, a tray 5 and the plastic fuel tank in the above scheme, the frame 9 is provided with a mounting cavity with an opening facing downward, the fuel tank body 1 is fixedly arranged on the tray 5, the fuel tank body 1 extends into the mounting cavity from the opening, and the tray 5 is fixedly connected to the frame 9 and closes the opening. In the present embodiment, when the plastic fuel tank needs to be replaced and maintained, it is only necessary to separate the tray 5 from the frame 9, and the fuel tank body 1 can be removed from the opening of the mounting cavity facing downward, without disassembling the components above the frame 9, so the plastic fuel tank can be quickly disassembled and assembled, and the maintenance convenience is high.

[0053] Optionally, the bottom wall of the fuel tank body 1 and the top wall of the fuel tank body 1 are respectively provided with a first through hole 14 and a second through hole 15, and the first through hole 14 and the second through hole 15 are respectively connected to the connecting pipe 4; the first fastener 6 is sequentially penetrated through the first through hole 14, the connecting pipe 4, the second through hole 15 and the tray 5, and one end of the first fastener 6 abuts against the outer side of the top wall of the fuel tank body 1, and the other end abuts against the side of the tray 5 away from the fuel tank body 1. In this embodiment, the first fastener 6 presses the fuel tank body 1 onto the tray 5, thereby realizing the mutual fixation between the fuel tank body 1 and the tray 5, and because the tray 5 is fixedly connected to the frame 9, the fixation between the fuel tank body 1 and the frame 9 is indirectly realized.

[0054] Specifically, the tray 5 is made of metal material and is fixed to the vehicle frame 9 by bolts or welding. The function of the tray 5 is to protect and fix the fuel tank body 1 .

[0055] As for the specific structure of the first fastener 6, optionally, the first fastener 6 includes a first bolt 61, a first gasket 62, a first metal sleeve 63, a rubber sleeve 64, a connecting rod 65, a second metal sleeve 66, a second gasket 67 and a second bolt 68. The two ends of the connecting rod 65 are respectively provided with a first threaded hole and a second threaded hole. The connecting rod 65 is inserted into the connecting pipe 4. The first bolt 61 passes through the first gasket 62, the first metal sleeve 63, and the rubber sleeve 64 in sequence and is screwed with the hole wall of the first threaded hole to abut the rubber sleeve 64 against the outer side of the top wall of the tank body 1. The second bolt 68 passes through the tray 5, the second gasket 67, the second metal sleeve 66 and is screwed with the hole wall of the second threaded hole to abut the screw head of the second bolt 68 against the side of the tray 5 away from the tank body 1. In this embodiment, the outer diameter of the first metal sleeve 63 is greater than the inner diameter of the rubber sleeve 64, and the inner diameter of the first metal sleeve 63 is smaller than the outer diameter of the screw head of the first bolt 61, so that the screw head of the first bolt 61 presses the rubber sleeve 64 against the top wall of the tank body 1 through the first metal sleeve 63; the outer diameter of the second metal sleeve 66 is greater than the inner diameter of the through hole on the tray 5, and the inner diameter of the second metal sleeve 66 is smaller than the outer diameter of the screw head of the second bolt 68, so that the screw head of the second bolt 68 abuts the second metal sleeve 66 against the tray 5.

[0056] Optionally, the rubber sleeve 64 is used to prevent the first bolt 61 and the first metal sleeve 63 from damaging the fuel tank body 1 and to extend the service life of the fuel tank body 1. The rubber sleeve 64 is in a frustum shape, and the hole wall of the first through hole 14 is also in a frustum shape.

[0057] Optionally, the sloped bottom wall 12 is divided into a first slope 121, a horizontal connecting surface 122, and a second slope 123 along the first horizontal direction X, wherein the first slope 121 is connected to the horizontal bottom wall 11, and the horizontal connecting surface 122 is in contact with the horizontal surface on the tray 5. The horizontal surface on the tray 5 supports the horizontal connecting surface 122 along the vertical direction Z, and the second bolt 68 passes through the horizontal surface on the tray 5 and is screwed to the hole wall of the second threaded hole.

[0058] Optionally, the tray 5 is provided with a guide member 51, which extends along the vertical direction Z; the outer peripheral wall of the oil tank body 1 is provided with a guide groove 16, and the guide member 51 is inserted into the guide groove 16. In this embodiment, this arrangement facilitates the positioning and installation of the oil tank body 1 on the tray 5, so that the oil tank pump body is relatively fixed to the tray 5 in a horizontal plane.

[0059] Optionally, the guide member 51 is fixedly connected to the frame, so that the tray 5 is fixedly connected to the frame 9. In this embodiment, the frame 9 includes two longitudinal beams spaced apart along the second horizontal direction Y, and the mounting cavity is located between the two longitudinal beams. When the fuel tank body 1 is extended into the mounting cavity, the guide member 51 is extended into the mounting cavity and fits with the corresponding longitudinal beam. At this time, the guide member is fixed to the corresponding longitudinal beam by fixing bolts.

[0060] Optionally, a limiting groove 17 is recessed on the outer side of the top wall of the fuel tank body 1, and the limiting groove 17 extends along the second horizontal direction Y, and the first horizontal direction X is perpendicular to the second horizontal direction Y; the vehicle chassis also includes a second fastener 7, which is arranged in the limiting groove 17 and fixedly connected to the frame 9. In this embodiment, the limiting groove 17 can be on the other side of the fuel tank body 1 extending along the second horizontal direction Y, and then the second fastener 7 is a strip pressure plate, which is arranged in the limiting groove 17, and the two ends of the strip pressure plate are respectively fixedly connected to the two longitudinal beams of the frame 9. In other embodiments, the second fastener 7 can also be an angle steel, one connecting surface of the angle steel is in contact with and abuts against the groove wall of the limiting groove 17, and the other connecting surface of the angle steel is fixedly connected to the frame 9.

[0061] Optionally, the vehicle chassis further comprises a third fastener 8, which is disposed between one side of the fuel tank body 1 along the first horizontal direction X and the vehicle frame 9, and the third fixing member is fixedly connected to the fuel tank body 1 and the vehicle frame 9 respectively.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Plastic fuel tank, characterized in that: include: An oil tank body (1), wherein the bottom wall of the oil tank body (1) is divided into a horizontal bottom wall (11) and a sloped bottom wall (12) in sequence along a first horizontal direction (X), and the sloped bottom wall (12) is inclined toward a direction close to the top wall of the oil tank body (1); An oil storage structure (2), the oil storage structure (2) being arranged on the horizontal bottom wall (11), the two ends of the oil storage structure (2) respectively extending toward two side walls extending along the first horizontal direction (X) close to the oil tank body (1), the oil storage structure (2) and the sloped bottom wall (12) enclosing an oil storage tank (21); An oil suction pipe (3), wherein the oil suction pipe (3) extends into the oil storage tank (21).

2. The plastic fuel tank according to claim 1, characterized in that: The oil storage structure (2) is an arc-shaped structure, and the opening of the oil storage structure (2) is opposite to the slope bottom wall (12).

3. The plastic fuel tank according to claim 2, characterized in that: The oil storage structure (2) is formed by the horizontal bottom wall (11) being recessed into the interior of the oil tank body (1).

4. The plastic fuel tank according to claim 3, characterized in that: Both ends of the oil storage structure (2) are in arc shape.

5. The plastic fuel tank according to claim 1, characterized in that: The horizontal bottom wall (11) and / or the sloped bottom wall (12) are provided with convex ribs (13) extending along a second horizontal direction (Y), and the first horizontal direction (X) and the second horizontal direction (Y) are perpendicular.

6. The plastic fuel tank according to claim 1, characterized in that: It also comprises a connecting pipe (4), the connecting pipe (4) being located inside the oil tank body (1), and the two ends of the connecting pipe (4) being respectively fixedly connected to the bottom wall of the oil tank body (1) and the top wall of the oil tank body (1).

7. A vehicle chassis, comprising a vehicle frame (9), a tray (5), and a plastic fuel tank according to any one of claims 1 to 6, characterized in that: The frame (9) is provided with a mounting cavity with an opening facing downwards, the oil tank body (1) is fixedly mounted on the tray (5), the oil tank body (1) extends from the opening into the mounting cavity, and the tray (5) is fixedly connected to the frame (9) and closes the opening.

8. The vehicle chassis according to claim 7, characterized in that: The plastic fuel tank further comprises a connecting pipe (4), the connecting pipe (4) being located inside the fuel tank body (1), the two ends of the connecting pipe (4) being respectively fixedly connected to the bottom wall of the fuel tank body (1) and the top wall of the fuel tank body (1), the bottom wall of the fuel tank body (1) and the top wall of the fuel tank body (1) being respectively provided with a first through hole (14) and a second through hole (15), the first through hole (14) and the second through hole (15) being respectively connected to the connecting pipe (4); The vehicle chassis further comprises a first fastener (6), the first fastener (6) being sequentially inserted through the first through hole (14), the connecting pipe (4), the second through hole (15) and the tray (5), one end of the first fastener (6) being in contact with the outer side of the top wall of the fuel tank body (1), and the other end being in contact with a side of the tray (5) away from the fuel tank body (1).

9. The vehicle chassis according to claim 8, characterized in that: The first fastener (6) comprises a first bolt (61), a rubber sleeve (64), a connecting rod (65) and a second bolt (68). The connecting rod (65) is provided with a first threaded hole and a second threaded hole at both ends, respectively. The connecting rod (65) is inserted into the connecting pipe (4). The first bolt (61) passes through the rubber sleeve (64) and is screwed to the hole wall of the first threaded hole so as to abut the rubber sleeve (64) against the outer side of the top wall of the oil tank body (1). The second bolt (68) passes through the tray (5) and is screwed to the hole wall of the second threaded hole so as to abut the screw head of the second bolt (68) against the side of the tray (5) away from the oil tank body (1).

10. The vehicle chassis according to claim 7, characterized in that: The tray (5) is provided with a guide member (51), and the guide member (51) extends along a vertical direction (Z); The outer peripheral wall of the oil tank body (1) is provided with a guide groove (16), and the guide member (51) is inserted into the guide groove (16).

11. The vehicle chassis according to claim 10, characterized in that The guide member (51) is fixedly connected to the vehicle frame (9) so that the tray (5) is fixedly connected to the vehicle frame (9).

12. The vehicle chassis according to claim 7, characterized in that: A limiting groove (17) is recessed on the outer side of the top wall of the oil tank body (1), and the limiting groove (17) extends along a second horizontal direction (Y), and the first horizontal direction (X) and the second horizontal direction (Y) are perpendicular; The vehicle chassis also includes a second fastener (7), which is arranged in the limiting groove (17) and is fixedly connected to the vehicle frame (9).

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