Rear frame fuel tank and tractor

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a rear frame fuel tank and a tractor. The rear frame fuel tank comprises a rear frame, a main fuel tank is formed, and the main fuel tank is provided with a first oil filling port and a first oil suction port; the auxiliary fuel tank is arranged on the side of the rear frame, the auxiliary fuel tank is provided with a second oil filling port, a ventilation pipeline and a fuel pipeline, the ventilation pipeline and the fuel pipeline are communicated with the main fuel tank, and at least one of the main fuel tank and the auxiliary fuel tank can supply oil; the fuel oil pipeline can be disconnected from the main fuel oil tank to form a second oil suction port for the auxiliary fuel oil tank to supply and convey fuel oil to the outside; when the fuel oil pipeline is communicated, fuel oil in the main fuel oil tank and the auxiliary fuel oil tank can be supplied outwards from the first oil suction port. According to the utility model, the main fuel tank and the auxiliary fuel tank are arranged, so that the requirement of a high-horsepower tractor for acting fuel for a long time can be met, and at least one of the main fuel tank and the auxiliary fuel tank can supply oil to meet different working conditions and the requirement for adjusting the weight of the whole tractor.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a rear frame fuel tank and a tractor. Background Art

[0002] At present, tractors on the market are divided into two types according to the chassis structure: frameless type and frame type. Among them, the chassis structure of high-horsepower articulated tractors basically adopts the frame type structure, and the frame type is further divided into two structures; one includes the front frame, articulated components, and the rear axle and rear frame are integrated; the other includes the front frame, tie rods and independent rear frame structure; in the first structure, the articulated components are directly connected to the housing of the rear axle, the rear axle housing also serves as the rear frame, the rear suspension and power output (PTO) are connected through the rear axle housing, and the fuel tank is placed above the rear axle. The volume is relatively large, and the operating load and impact are directly transmitted to the rear axle housing. This solution has high requirements on the design and manufacturing of the rear axle housing and the rear axle, and has poor versatility. In the second structure, the rear axle is installed on an independent rear frame, and the rear frame is hinged to the front frame through the bottom of the frame. A pull rod is provided on the upper part, and one end of the pull rod is hinged to the front frame, and the other end is hinged to the rear end of the rear frame, forming a three-point swing structure as a whole. The rear suspension and PTO are installed on the rear frame, and a fuel tank is provided on the rear frame. Due to the standard requirements of the operating vision, the fuel tank volume is relatively small.

[0003] In order to adapt to the short agricultural operating season, large tractors, especially large articulated tractors, need to operate continuously for a long time. As the tractor power increases, fuel consumption increases accordingly, so the capacity of the fuel tank is required to be larger and larger. However, when the operating conditions limit the weight of the entire machine, the fuel tank cannot be adjusted, the application is not flexible, and when the fuel tank leaks due to abnormal impact or damage, it cannot supply fuel normally, affecting the operation of the entire machine. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a rear frame fuel tank and a tractor to solve the problem that the fuel tank of the existing tractor is inflexible in application and cannot be used normally when fuel leakage occurs or the weight of the whole machine is limited.

[0005] The first aspect of the utility model provides a rear frame fuel tank, wherein the rear frame fuel tank comprises:

[0006] The rear frame is formed with a main fuel tank, wherein the main fuel tank has a first fuel filling port and a first fuel suction port;

[0007] An auxiliary fuel tank is arranged on the side of the rear frame, and the auxiliary fuel tank has a second refueling port and a ventilation pipeline and a fuel pipeline connected to the main fuel tank, and at least one of the main fuel tank and the auxiliary fuel tank can supply fuel; the fuel pipeline can be disconnected from the main fuel tank and form a second fuel suction port for supplying fuel to the outside, so that the auxiliary fuel tank can supply fuel to the outside through the second fuel suction port; when the fuel pipelines are connected, the fuel in the main fuel tank and the auxiliary fuel tank can be supplied to the outside from the first fuel suction port.

[0008] Preferably, a plurality of the auxiliary fuel tanks are provided, and at least two of the auxiliary fuel tanks are provided on both sides of the main fuel tank in the width direction of the vehicle body.

[0009] Preferably, the second fuel filling port is arranged at the top of the auxiliary fuel tank;

[0010] An auxiliary ventilation pipeline communicating with the auxiliary fuel tank is formed on the side wall of the second fuel filling port.

[0011] Preferably, the tank wall of the auxiliary fuel tank is formed with a first reinforcement portion recessed inwardly;

[0012] A recessed clamping groove is formed at the bottom of the auxiliary fuel tank;

[0013] The rear frame fuel tank also includes:

[0014] The first support member is fixedly connected to the side wall of the rear frame, the first support member is formed into a strip structure extending along the length direction of the clamping groove, and the first support member is clamped with the clamping groove.

[0015] Preferably, the rear frame fuel tank further comprises:

[0016] An embedded part is arranged at the bottom of the auxiliary fuel tank;

[0017] The second support member is fixedly connected to the side wall of the rear frame, and the second support member is formed with a supporting portion extending toward the auxiliary fuel tank, and the supporting portion is connected to the embedded component.

[0018] Preferably, the rear frame fuel tank further comprises:

[0019] A fender is arranged on the side of the rear frame, and the bottom of the auxiliary fuel tank is conformally attached to the top of the fender.

[0020] Preferably, the rear frame is formed with a first mounting portion, a second mounting portion and a third mounting portion, the first mounting portion and the second mounting portion are both formed as tubular structures, the third mounting portion is formed as a groove structure with an opening arranged downward, the groove structure penetrates the main body of the rear frame along the width direction of the vehicle body, the first mounting portion, the second mounting portion and the third mounting portion are connected to each other, and at least part of the outer walls of the first mounting portion, the second mounting portion and the third mounting portion are formed as the inner wall of the main fuel tank.

[0021] Preferably, a second reinforcement portion is formed on the inner wall of the main fuel tank, and the second reinforcement portion is connected to the outer wall of the first mounting portion, the second mounting portion and / or the third mounting portion;

[0022] A third reinforcement portion is formed on the outer wall of the main fuel tank, and the third reinforcement portion is connected to the outer wall of the third mounting portion.

[0023] Preferably, the first mounting portion is arranged above the second mounting portion;

[0024] The rear frame is further formed with a fourth mounting portion arranged below the second mounting portion, the fourth mounting portion is formed as a tubular structure, an outer wall of the fourth mounting portion is formed with a protruding fourth reinforcement portion, and the fourth reinforcement portion is arranged at an angle to the extension direction of the fourth mounting portion.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The rear frame fuel tank of the utility model integrates the main fuel tank with the rear frame, and sets a sub-fuel tank on the side of the rear frame to meet the long-term fuel demand of high-horsepower tractors. At least one of the main fuel tank and the sub-fuel tank can supply fuel; the fuel pipeline can be disconnected from the main fuel tank and form a second oil suction port for supplying fuel to the outside, so that the sub-fuel tank can supply fuel to the outside through the second oil suction port; when the fuel pipeline is connected, the fuel in the main fuel tank and the sub-fuel tank can be supplied to the outside from the first oil suction port, so as to meet different working conditions and the weight adjustment requirements of the whole machine. When the main fuel tank is damaged due to abnormal impact stress or other abnormal conditions and leaks, the sub-fuel tank can be used to supply fuel to ensure the normal operation of the whole machine and the tractor can be smoothly transferred to the maintenance area within a certain period of time, thereby improving the redundant safety of fuel supply. When the sub-fuel tank is damaged, only the main fuel tank can be used to work to ensure the operation.

[0027] In addition, the main fuel tank and at least one auxiliary fuel tank can be filled with fuels with different freezing points. In this way, in a severely cold working environment, low-freezing-point fuel can be used first to supply fuel, and then high-freezing-point fuel can be enabled to supply fuel after the engine has worked for a period of time, thereby solving the problem of high costs caused by only using low-freezing-point fuel.

[0028] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a rear frame fuel tank provided in an embodiment of the utility model;

[0031] Figure 2 A schematic diagram of the bottom structure of the auxiliary fuel tank in the rear frame fuel tank provided in an embodiment of the utility model;

[0032] Figure 3 A schematic structural diagram of a first support member and a second support member in a rear frame fuel tank provided in an embodiment of the utility model;

[0033] Figure 4 A schematic diagram of the structure of the auxiliary fuel tank in the rear frame fuel tank provided by an embodiment of the utility model;

[0034] Figure 5 A schematic structural diagram of the auxiliary fuel tank in the rear frame fuel tank provided by an embodiment of the utility model from another perspective;

[0035] Figure 6 A schematic diagram of the internal structure of a main fuel tank in a rear frame fuel tank provided in an embodiment of the utility model;

[0036] Figure 7 A schematic diagram of the internal structure of the main fuel tank in the rear frame fuel tank provided by an embodiment of the utility model under another application;

[0037] Figure 8 A schematic diagram of the bottom structure of a rear frame fuel tank provided in an embodiment of the utility model;

[0038] Fig. 9 A schematic structural diagram of a main fuel tank in a rear frame fuel tank provided in an embodiment of the utility model.

[0039] Icons: 1-rear frame; 11-main fuel tank; 101-first refueling port; 102-first fuel suction port; 111-first mounting portion; 112-second mounting portion; 113-third mounting portion; 114-fourth mounting portion; 115-second reinforcement portion; 116-third reinforcement portion; 117-fourth reinforcement portion; 20-auxiliary fuel tank; 21-second refueling port; 211-auxiliary ventilation line; 22-ventilation line; 23-fuel line; 231-second fuel suction port; 24-first reinforcement portion; 25-clamping groove; 31-first support member; 32-second support member; 321-supporting portion; 40-embedded part; 50-mudguard; 60-fixed seat; 70-refueling module. DETAILED DESCRIPTION

[0040] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0041] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0042] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0043] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0044] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0045] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0046] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0047] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0048] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0049] According to a first aspect of the present utility model, a rear frame fuel tank is provided, which comprises a rear frame 1 and an auxiliary fuel tank 20 .

[0050] Hereinafter, the specific structures of the above-mentioned components of the fuel tank of the rear frame 1 according to the present embodiment will be described.

[0051] In this embodiment, if Figures 1 to 3 As shown, the rear frame 1 is formed with a main fuel tank 11, and the main fuel tank 11 has a first fuel filling port 101 and a first fuel suction port 102. The main fuel tank 11 can supply fuel to the outside through the first fuel suction port 102; the first fuel filling port 101 is arranged at the top of the main fuel tank 11, and fuel can be added to the main fuel tank 11 through the first fuel filling port 101 and the second fuel filling port 21 described below, and the first fuel suction port 102 is arranged at the bottom of the main fuel tank 11, and fuel is supplied to the outside through the first fuel suction port 102.

[0052] In this embodiment, if Figures 1 to 5 As shown, the auxiliary fuel tank 20 is arranged on the side of the rear frame 1, and the auxiliary fuel tank 20 has a second refueling port 21 and a ventilation pipe 22 and a fuel pipe 23 connected to the main fuel tank 11. When the main fuel tank 11 and the auxiliary fuel tank 20 contain the same type of fuel, the fuel in the auxiliary fuel tank 20 can be transported to the main fuel tank 11 via the fuel pipe 23. Similarly, the fuel in the main fuel tank 11 can be transported to the auxiliary fuel tank 20 via the fuel pipe 23.

[0053] Furthermore, the ventilation line 22 and the fuel line 23 are in a connected or blocked state, so that at least one of the main fuel tank 11 and the auxiliary fuel tank 20 is used for fuel supply, thereby meeting different operating conditions and the weight adjustment requirements of the whole machine; when the main fuel tank 11 cannot supply fuel or temporarily does not supply fuel (for example, when the main fuel tank 11 is damaged due to abnormal impact stress, or leaks due to other abnormal conditions, or when the weight of the whole machine needs to be reduced, or in severe cold conditions), the fuel line 23 is disconnected from the main fuel tank 11 and forms a second fuel suction port 231 for supplying fuel to the outside, so that the fuel in the auxiliary fuel tank 20 can be supplied to the outside from the second fuel suction port 231; that is, by controlling the fuel line 23 to be connected or disconnected with the main fuel tank 11, the fuel in the auxiliary fuel tank 20 can be regulated to be supplied to the outside from the first fuel suction port 102 or the second fuel suction port 231.

[0054] In this embodiment, the main fuel tank 11 and the auxiliary fuel tank 20 can be filled with the same type of fuel or different types of fuel. For example, the freezing points of the fuel in the main fuel tank 11 and at least one auxiliary fuel tank 20 can be different. In this way, in a severely cold working environment, a low freezing point fuel can be used first to supply fuel, and then a high freezing point fuel can be enabled to supply fuel after the engine has worked for a period of time, thereby solving the problem of high costs caused by only using low freezing point fuel.

[0055] It should be noted that when the main fuel tank 11 and the auxiliary fuel tank 20 contain the same type of fuel and are connected in the fuel pipeline 23, the fuel in the main fuel tank 11 and the auxiliary fuel tank 20 can be supplied to the outside from the first oil suction port 102. At this time, the volume of the fuel tank is the largest, which can meet the fuel demand of high-horsepower tractors for long-term operation.

[0056] That is, in this embodiment, only the main fuel tank 11 can supply fuel, only the auxiliary fuel tank 20 can supply fuel, or both the main fuel tank 11 and the auxiliary fuel tank 20 can supply fuel. It should be noted that when the weight of the whole machine needs to be reduced, the main fuel tank 11 or at least one auxiliary fuel tank 20 can be selected without refueling.

[0057] It should be further explained that the fuel line 23 can be sealed with a sealing plate, and the vent line 22 can be sealed with a screw plug. However, the components used for sealing are not limited to these, as long as they can disconnect the connection between the main fuel tank 11 and the auxiliary fuel tank 20.

[0058] In this embodiment, when refueling is performed through the second refueling port 21, the first refueling port 101 is closed, and the gas in the main fuel tank 11 can be transported to the auxiliary fuel tank 20 through the ventilation line 22 and discharged through the second refueling port 21. Similarly, when refueling is performed through the first refueling port 101, the second refueling port 21 is closed, and the gas in the auxiliary fuel tank 20 can be transported to the main fuel tank 11 through the ventilation line 22 and discharged through the first refueling port 101. The provision of the ventilation line 22 can speed up the discharge of gas in the tank and effectively improve the refueling efficiency.

[0059] It should be noted that, in this embodiment, Fig. 9 As shown, the fuel tank of the rear frame 1 further includes a refueling module 70 connected to the first refueling port 101 , and the refueling module 70 may be an adapter.

[0060] In this embodiment, if Figure 1 As shown, the ventilation line 22 is arranged at the top of the auxiliary fuel tank 20 and the main fuel tank 11, and the fuel line 23 is arranged at the bottom of the auxiliary fuel tank 20; the second fuel filling port 21 is arranged at the top of the auxiliary fuel tank 20; in a preferred embodiment, the side wall of the second fuel filling port 21 is formed with an auxiliary ventilation line 211 connected to the auxiliary fuel tank 20, so that the gas can also be discharged through the auxiliary ventilation line 211 to speed up the efficiency of gas discharge. The auxiliary ventilation line 211 can be formed into a bent tubular structure.

[0061] In a preferred embodiment, Figure 1As shown, there are multiple auxiliary fuel tanks 20, wherein at least two auxiliary fuel tanks 20 are arranged on both sides of the main fuel tank 11 in the width direction of the vehicle body, and each auxiliary fuel tank 20 can be connected to the main fuel tank 11. Preferably, two auxiliary fuel tanks 20 are arranged, and the two auxiliary fuel tanks 20 are arranged on the left and right sides of the main fuel tank 11, and the two auxiliary fuel tanks 20 are symmetrically arranged along the length direction of the vehicle body.

[0062] Furthermore, in this embodiment, if Figures 1 to 5 As shown, the tank wall of the auxiliary fuel tank 20 is formed with a first reinforcing portion 24 that is recessed inwardly, and preferably a plurality of first reinforcing portions 24 are provided, so that the outer wall of the auxiliary fuel tank 20 is formed into an uneven surface, thereby improving the structural strength of the auxiliary fuel tank 20, thereby improving the ability of the auxiliary fuel tank 20 to resist external impacts.

[0063] In this embodiment, if Figures 1 to 4 As shown, a recessed snap-in groove 25 is formed at the bottom of the auxiliary fuel tank 20, and the snap-in groove 25 is formed into a strip structure extending in the width direction of the vehicle body. The fuel tank of the rear frame 1 also includes a first support member 31 fixedly connected to the side wall of the rear frame 1, and the first support member 31 is formed into a strip structure extending in the length direction of the snap-in groove 25. The first support member 31 is snap-fitted with the snap-in groove 25, so as to give the auxiliary fuel tank 20 a certain support capacity. In this embodiment, the first support member 31 is arranged in the middle position of the auxiliary fuel tank 20 to ensure uniform force. Preferably, the cross section of the first support member 31 is formed into a rectangle to improve the stability of the placement of the auxiliary fuel tank 20.

[0064] In a preferred embodiment, a seal is provided between the first support member 31 and the clamping groove 25, and the seal fills the gap between the first support member 31 and the clamping groove 25 to limit the degree of freedom of the auxiliary fuel tank 20 in the downward direction, and ensure that the first support member 31 can effectively bear the weight of the auxiliary fuel tank 20. The seal can be formed by vulcanizing a layer of rubber on the outer surface of the first support member 31.

[0065] Furthermore, in this embodiment, if Figures 1 to 4 As shown, the fuel tank of the rear frame 1 further includes an embedded part 40 and a second support part 32; the embedded part 40 is arranged at the bottom of the auxiliary fuel tank 20 to improve the structural strength and rigidity of the bottom of the auxiliary fuel tank 20, the embedded part 40 can be formed into a plate-like structure, the second support part 32 is fixedly connected to the side wall of the rear frame 1, the second support part 32 can be formed into a bent rod-like structure, and one end thereof in the length direction is formed into a supporting part 321 extending toward the auxiliary fuel tank 20, the supporting part 321 can be a horizontally arranged plate-like structure, and the supporting part 321 is connected to the embedded part 40, so that the second support part 32 effectively supports the bottom of the auxiliary fuel tank 20, thereby further ensuring that the auxiliary fuel tank 20 is firmly and stably connected to the rear frame 1.

[0066] In addition, in the present embodiment, the auxiliary fuel tank 20 and the main fuel tank 11 can be connected by bolts, and the length direction of the bolts is the same as the parallel arrangement direction of the auxiliary fuel tank 20 and the main fuel tank 11, so that the first support member 31 and the second support member 32 jointly bear the weight of the auxiliary fuel tank 20 and the bending moment generated, and the bolts only bear tension but not shear force, thereby ensuring that the auxiliary fuel tank 20 and the main fuel tank 11 are reliably fixed.

[0067] In this embodiment, if Figure 1 and Figure 2 As shown, the fuel tank of the rear frame 1 further includes a fender 50 arranged on the side of the rear frame 1, and the tire is arranged below the fender 50. The fender 50 can effectively prevent foreign matter such as mud driven by the rotation of the tire from splashing onto the auxiliary fuel tank 20, thereby forming effective protection. In a preferred embodiment, the auxiliary fuel tank 20 is arranged above the fender 50, and the bottom of the auxiliary fuel tank 20 is conformally attached to the top of the fender 50, so that the bottom of the auxiliary fuel tank 20 forms an arc structure, which can not only increase the oil storage capacity but also serve as a part of the whole machine shape, thereby improving the aesthetics of the tractor.

[0068] Furthermore, in this embodiment, if Figures 1 to 9 As shown, the rear frame 1 is formed with a first mounting portion 111, a second mounting portion 112 and a third mounting portion 113, the first mounting portion 111 is used to mount the power output shaft, the second mounting portion 112 is used to mount the rear axle drive shaft, and the third mounting portion 113 is used to mount one end of the drive axle.

[0069] Specifically, the first mounting portion 111 and the second mounting portion 112 are both formed as tubular structures extending along the length direction of the vehicle body, the first mounting portion 111 is arranged above the second mounting portion 112 and the first mounting portion 111 and the second mounting portion 112 have the same extension direction, the third mounting portion 113 is formed as a groove structure with an opening arranged downward, the groove structure penetrates the main body of the rear frame 1 along the width direction of the vehicle body, and the extension direction of the third mounting portion 113 is perpendicular to the extension direction of the first mounting portion 111 and the second mounting portion 112; the first mounting portion 111, the second mounting portion 112 and the third mounting portion 113 are connected to each other to meet the connection requirements of each component.

[0070] In this embodiment, if Figure 7 As shown, at least part of the outer walls of the first mounting portion 111, the second mounting portion 112 and the third mounting portion 113 form the inner wall of the main fuel tank 11, so that the oil storage space of the main fuel tank 11 is surrounded by the outer walls of different mounting portions and the plate-like structure, and the entire space layout is more reasonable and compact, which is conducive to the improvement of fuel capacity.

[0071] Furthermore, in this embodiment, if Figure 6As shown, the inner wall of the main fuel tank 11 is formed with a second reinforcement part 115, and the second reinforcement part 115 is connected to the outer wall of the first mounting part 111, the second mounting part 112 and / or the third mounting part 113. The second reinforcement part 115 can be formed into a strip or a plate-like structure with an opening, as long as the structural strength of the main fuel tank 11 can be improved and the fuel supply can be ensured to be normal. Preferably, a plurality of second reinforcement parts 115 are provided, and the plurality of second reinforcement parts 115 are arranged at intervals in the vertical direction to improve the reinforcement effect.

[0072] Furthermore, in this embodiment, if Figure 6 , Figure 8 and Fig. 9 As shown, the outer wall of the main fuel tank 11 is formed with a third reinforcement portion 116, and the third reinforcement portion 116 is connected to the outer wall of the third mounting portion 113, thereby improving the structural strength and rigidity of the rear frame 1. The third reinforcement portion 116 can be a triangular plate-like structure, or a rod-like structure with two ends respectively connected to the third mounting portion 113 and the outer wall of the main fuel tank 11 to form a triangle.

[0073] Preferably, a plurality of third reinforcing portions 116 are provided, and the plurality of third reinforcing portions 116 are arranged at intervals around the outer wall of the groove structure of the third mounting portion 113 .

[0074] In this embodiment, if Figure 8 and Fig. 9 As shown, the rear frame 1 is further formed with a fourth mounting portion 114 arranged below the second mounting portion 112, and the fourth mounting portion 114 is used to install the whole machine drawbar, and the fourth mounting portion 114 is formed as a tubular structure, and the outer wall of the fourth mounting portion 114 is formed with a protruding fourth reinforcing portion 117, and the fourth reinforcing portion 117 is arranged at an angle with the extension direction of the fourth mounting portion 114, for example, the angle is 90 degrees, so as to improve the structural strength of the fourth mounting portion 114, and the fourth reinforcing portion 117 can be formed as a strip or triangular plate structure, etc., and the fourth reinforcing portion 117 is preferably provided in plurality, and the plurality of fourth reinforcing portions 117 are arranged at intervals along the extension direction of the fourth mounting portion 114 to improve the overall strength of the fourth mounting portion 114.

[0075] In addition, in this embodiment, if Fig. 9 As shown, the rear frame 1 also includes a fixing seat 60 arranged on the outer wall of the main fuel tank 11. The fixing seat 60 can be formed into a block-shaped or plate-shaped structure. The fixing seat 60 is provided with a threaded hole. The fender 50, the first support member 31 and the second support member 32 as described above can be installed on the outer wall of the main fuel tank 11 via the fixing seat 60, so as not to cause damage to the tank body of the main fuel tank 11.

[0076] According to the rear frame fuel tank of the utility model, the structure is simple and the adjustment is flexible. The main fuel tank is integrated with the rear frame, and the auxiliary fuel tank is arranged on the side of the rear frame to meet the long-term fuel demand of the high-horsepower tractor. At least one of the main fuel tank and the auxiliary fuel tank can supply fuel; the fuel pipeline can be disconnected from the main fuel tank and form a second oil suction port for supplying fuel to the outside, so that the auxiliary fuel tank can supply fuel to the outside through the second oil suction port; when the fuel pipeline is connected, the fuel in the main fuel tank and the auxiliary fuel tank can be supplied to the outside from the first oil suction port, so as to meet the different working conditions and the weight adjustment requirements of the whole machine. When the main fuel tank is damaged due to abnormal impact stress or other abnormal conditions and leaks, the auxiliary fuel tank can be used to supply fuel to ensure the normal operation of the whole machine and the tractor can be smoothly transferred to the maintenance area within a certain period of time, thereby improving the redundant safety of fuel supply. When the auxiliary fuel tank is damaged, only the main fuel tank can be used to work to ensure the operation.

[0077] In addition, the main fuel tank and at least one auxiliary fuel tank can be filled with fuels with different freezing points. In this way, in a severely cold working environment, low-freezing-point fuel can be used first to supply fuel, and then high-freezing-point fuel can be enabled to supply fuel after the engine has worked for a period of time, thereby solving the problem of high costs caused by only using low-freezing-point fuel.

[0078] A second aspect of the utility model provides a tractor, comprising the rear frame fuel tank as described above, and thus having all the beneficial technical effects of the rear frame fuel tank, which will not be described in detail herein.

[0079] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A rear frame fuel tank, characterized in that: The rear frame fuel tank comprises: The rear frame is formed with a main fuel tank, wherein the main fuel tank has a first fuel filling port and a first fuel suction port; An auxiliary fuel tank is arranged on the side of the rear frame, and the auxiliary fuel tank has a second refueling port and a ventilation pipeline and a fuel pipeline connected to the main fuel tank, and at least one of the main fuel tank and the auxiliary fuel tank can supply fuel; the fuel pipeline can be disconnected from the main fuel tank and form a second fuel suction port for supplying fuel to the outside, so that the auxiliary fuel tank can supply fuel to the outside through the second fuel suction port; when the fuel pipelines are connected, the fuel in the main fuel tank and the auxiliary fuel tank can be supplied to the outside from the first fuel suction port.

2. The rear frame fuel tank according to claim 1, characterized in that: The auxiliary fuel tanks are provided in plurality, and at least two of the auxiliary fuel tanks are provided on both sides of the main fuel tank in the width direction of the vehicle body.

3. The rear frame fuel tank according to claim 1, characterized in that: The second fuel filling port is arranged at the top of the auxiliary fuel tank; An auxiliary ventilation pipeline communicating with the auxiliary fuel tank is formed on the side wall of the second fuel filling port.

4. The rear frame fuel tank according to claim 1, characterized in that: The tank wall of the auxiliary fuel tank is formed with a first reinforcement portion recessed inwardly; A recessed clamping groove is formed at the bottom of the auxiliary fuel tank; The rear frame fuel tank also includes: The first support member is fixedly connected to the side wall of the rear frame, the first support member is formed into a strip structure extending along the length direction of the clamping groove, and the first support member is clamped with the clamping groove.

5. The rear frame fuel tank according to claim 1, characterized in that: The rear frame fuel tank also includes: An embedded part is arranged at the bottom of the auxiliary fuel tank; The second support member is fixedly connected to the side wall of the rear frame, and the second support member is formed with a supporting portion extending toward the auxiliary fuel tank, and the supporting portion is connected to the embedded component.

6. The rear frame fuel tank according to claim 1, characterized in that: The rear frame fuel tank also includes: A fender is arranged on the side of the rear frame, and the bottom of the auxiliary fuel tank is conformally attached to the top of the fender.

7. The rear frame fuel tank according to claim 1, characterized in that: The rear frame is formed with a first mounting portion, a second mounting portion and a third mounting portion, the first mounting portion and the second mounting portion are both formed as tubular structures, the third mounting portion is formed as a groove structure with an opening arranged downward, the groove structure penetrates the main body of the rear frame along the width direction of the vehicle body, the first mounting portion, the second mounting portion and the third mounting portion are connected to each other, and at least part of the outer walls of the first mounting portion, the second mounting portion and the third mounting portion are formed as the inner wall of the main fuel tank.

8. The rear frame fuel tank according to claim 7, characterized in that: The inner wall of the main fuel tank is formed with a second reinforcement portion, and the second reinforcement portion is connected to the outer wall of the first mounting portion, the second mounting portion and / or the third mounting portion; A third reinforcement portion is formed on the outer wall of the main fuel tank, and the third reinforcement portion is connected to the outer wall of the third mounting portion.

9. The rear frame fuel tank according to claim 7, characterized in that: The first mounting portion is arranged above the second mounting portion; The rear frame is further formed with a fourth mounting portion arranged below the second mounting portion, the fourth mounting portion is formed as a tubular structure, an outer wall of the fourth mounting portion is formed with a protruding fourth reinforcement portion, and the fourth reinforcement portion is arranged at an angle to the extension direction of the fourth mounting portion.

10. A tractor, characterized in that: Comprising the rear frame fuel tank according to any one of claims 1 to 9.

Images