Fuel tank assembly and engineering machinery

Abstract

The utility model discloses a fuel tank assembly and engineering machinery. The fuel tank assembly comprises an oil storage tank body, a lower oil tank body, a filling oil pipe and an oil pumping assembly. The oil storage tank has an oil storage cavity; the lower oil tank body is arranged at the bottom of the oil storage tank body and provided with a lower oil cavity. Fuel oil in the oil storage cavity can be filled into the lower oil cavity through the filling oil pipe; one end of the oil pumping assembly is installed on the top of the oil storage tank body, the other end of the oil pumping assembly is an oil pumping end, the oil pumping end extends into the bottom of the lower oil cavity from the oil storage cavity, and the oil pumping assembly is used for pumping fuel oil in the lower oil cavity into the engine assembly. The lower oil tank body is arranged at the bottom of the oil storage tank body, the lower oil tank body supplies oil to the engine assembly, and the oil storage tank body supplies oil to the lower oil tank body through height difference; and the longitudinal sectional area of the lower oil cavity is smaller than that of the oil storage cavity, so that the fuel utilization rate of the vehicle running on the slope is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a fuel tank assembly and engineering machinery. BACKGROUND

[0002] For engineering vehicles such as wheel cranes, a fuel tank for supplying oil to an engine is usually arranged on a chassis, and the fuel tank can only be arranged longitudinally because the vehicle longitudinal center needs to be arranged with a boom. When the vehicle is driving on an uphill / downhill road, the fuel in the fuel tank will be concentrated to the rear / front of the fuel tank due to gravity. As shown in Figure 1 When a fuel sensor with an oil pumping function is arranged on one side of the fuel tank, the fuel is concentrated to the other side when the crane is driving on a road with a slope, which can cause the fuel utilization rate in the tank to be as low as 60% in extreme conditions. As shown in the figure, although the fuel sensor is arranged in the middle, the fuel utilization rate is higher than that when the fuel sensor is arranged on one side, but in extreme conditions, about 25% of the fuel cannot be used when the vehicle is driving uphill or downhill, the fuel utilization rate is reduced, thereby affecting the transfer capacity of the wheel crane in mountainous areas. SUMMARY

[0003] The purpose of the present application is to provide a fuel tank assembly and engineering machinery to improve the fuel utilization rate of the fuel tank when the engineering vehicle is driving on a slope.

[0004] To achieve the above-mentioned purpose, the present application provides a fuel tank assembly applied to engineering machinery, wherein the engineering machinery comprises an engine assembly, and the fuel tank assembly comprises:

[0005] a storage tank body having a storage cavity;

[0006] a lower tank body arranged at the bottom of the storage tank body and having a lower oil cavity, the longitudinal cross-sectional area of the lower oil cavity being smaller than that of the storage cavity;

[0007] a refueling pipe through which fuel in the storage cavity can be refueled into the lower oil cavity;

[0008] an oil pumping assembly, one end of which is mounted to the top of the storage tank body, and the other end is an oil pumping end, the oil pumping end extending from the storage cavity to the bottom of the lower oil cavity, the oil pumping assembly being used to pump the fuel in the lower oil cavity into the engine assembly.

[0009] In some embodiments, the oil pumping assembly comprises a fuel sensor and an oil pumping pipe, the fuel sensor being mounted to the top of the storage tank body and being used to obtain the oil level of the storage cavity, and the oil pumping pipe extending from the fuel sensor to the bottom of the lower oil cavity.

[0010] In some embodiments, the lower oil tank is located in the middle of the oil storage tank, and oil inlets are arranged on the front and back sides of the lower oil tank, and two oil outlets are arranged on the bottom of the oil storage tank in the front-rear direction, and the two oil outlets are respectively communicated with the two oil inlets through the oil filling pipes.

[0011] In some embodiments, the angle between the plane where the line between the highest point of the oil inlet and the highest point of the oil outlet is located and the bottom of the lower oil tank satisfies the maximum slope angle of the oil suction pipe, and when the climbing slope of the engineering machinery is not greater than the maximum slope angle, the fuel above the highest point of the oil inlet can flow smoothly into the oil outlet.

[0012] In some embodiments, the bottom of the lower oil tank is provided with a first oil discharge port, and the bottom of the oil storage tank is provided with a second oil discharge port, and the first oil discharge port and the second oil discharge port are respectively provided with a magnetic member for adsorbing impurities.

[0013] In some embodiments, the number of the second oil discharge ports is two and they are arranged in the front-rear direction of the oil storage tank, and the two second oil discharge ports are respectively arranged close to the two oil outlets and between the two oil outlets.

[0014] In some embodiments, the top of the oil storage tank is further provided with an oil filling port, the oil filling port is provided with an oil tank cover, and the oil filling port is provided with a filter screen.

[0015] In some embodiments, the top of the oil storage tank is further provided with an oil return port, and the oil return port is communicated with the engine assembly through an oil return pipeline.

[0016] In some embodiments, the lower oil tank is open to the side facing the oil storage tank, and the lower oil tank and the oil storage tank are integrally connected.

[0017] The second aspect of the present application provides an engineering machinery, comprising a chassis, an engine assembly arranged on the chassis, and a fuel tank assembly as described above.

[0018] By the technical scheme, the fuel tank assembly comprises a storage tank body, a lower tank body, a fuel filling pipe and a fuel pumping assembly. The storage tank body has a storage cavity, the lower tank body is installed at the bottom of the storage tank body and has a lower cavity, fuel in the storage cavity can be filled into the lower cavity through the fuel filling pipe, one end of the fuel pumping assembly is installed at the top of the storage tank body, and the other end is a fuel pumping end and extends into the bottom of the lower cavity from the storage cavity. When the engine assembly is supplied with fuel, the fuel pumping end of the fuel pumping assembly pumps the fuel in the lower cavity into the fuel supply system of the engine assembly. In addition, the longitudinal sectional area of the lower cavity is much smaller than that of the storage cavity, and for the same amount of fuel, the liquid level in the lower cavity is much higher than that in the storage cavity, so when the vehicle is running on a slope, the fuel pumping end of the fuel pumping assembly of the present application can normally pump a small amount of oil in the lower cavity, so that the fuel in the entire fuel tank assembly can be more fully utilized.

[0019] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application together with the detailed description, but do not constitute a limitation on the present application. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0021] Figure 1 a structure schematic diagram of a fuel tank in the prior art;

[0022] Figure 2 a structure schematic diagram of the fuel tank assembly of the present application;

[0023] Figure 3 a structure schematic diagram of the fuel tank assembly of the present application when absorbing oil on a slope;

[0024] Figure 4 a working principle schematic diagram of the fuel tank assembly of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 10 storage tank body 20 lower tank body

[0027] 11 oil outlet 21 oil inlet

[0028] 12 second oil drain port 22 first oil drain port

[0029] 13 oil filling port 30 fuel filling pipe

[0030] 14 Fuel return port 40 Fuel sensor

[0031] 15 Fuel tank cap 41 Oil suction pipe Detailed Implementation

[0032] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0033] The fuel tank assembly and engineering machinery according to this application are described below with reference to the accompanying drawings.

[0034] like Figure 2 and Figure 3 As shown, this application provides a fuel tank assembly for use in construction machinery. The construction machinery includes an engine assembly, and the fuel tank assembly includes a fuel reservoir 10, a lower fuel tank 20, a fuel filling pipe 30, and a fuel extraction assembly. The fuel reservoir 10 has a fuel storage chamber for holding fuel. The lower fuel tank 20 is installed at the bottom of the fuel reservoir 10 and has a lower fuel chamber, the longitudinal cross-sectional area of ​​which is smaller than that of the fuel storage chamber. Fuel in the fuel storage chamber can be added to the lower fuel chamber through the fuel filling pipe 30. The fuel extraction assembly is installed at the bottom of the fuel reservoir 10, one end of which is installed at the top of the fuel reservoir 10, and the other end is a fuel extraction end that extends from the fuel storage chamber to the bottom of the lower fuel chamber. The fuel extraction assembly is used to extract fuel from the lower fuel chamber into the engine assembly.

[0035] In this embodiment, the lower fuel tank 20 and the fuel reservoir 10 are arranged separately as independent fuel tanks. Fuel in the lower fuel tank 20 is supplied to the engine assembly via a fuel extraction assembly, while fuel in the fuel reservoir 10 is transported to the lower fuel tank 20 via a fuel filler pipe 30 due to the height difference. When supplying fuel to the engine assembly, the extraction end of the fuel extraction assembly draws fuel from the lower fuel chamber into the engine assembly's fuel supply system. When fuel is discharged through the lower fuel chamber, because the longitudinal cross-sectional area of ​​the lower fuel chamber is much smaller than that of the fuel reservoir, the fuel level in the lower fuel chamber is much higher than that in the fuel reservoir for the same amount of fuel. Therefore, when the vehicle is driving on a slope, both the fuel reservoir and the lower fuel chamber are inclined relative to the ground, which is different from the prior art. Figure 1 The fuel tank structure of this application allows the oil extraction end of the oil extraction assembly to extract a small amount of oil from the lower oil chamber, thereby making fuller use of the fuel in the entire fuel tank assembly.

[0036] In some embodiments, the oil extraction assembly includes a fuel sensor 40 and an oil extraction pipe 41. The fuel sensor 40 is mounted on the top of the oil reservoir 10 and is used to obtain the oil level in the oil reservoir. The oil extraction pipe 41 extends from the fuel sensor 40 into the bottom of the lower oil reservoir.

[0037] The fuel extraction assembly features a fuel sensor 40 structure with integrated fuel extraction function, a common feature in the prior art. The fuel sensor 40 is connected to an instrument panel, which displays the fuel level in the fuel tank assembly, allowing operators to monitor the fuel status and refuel in a timely manner. The fuel extraction assembly also includes a fuel pump driven and connected to a fuel extraction pipe 41. Under the pump pressure, the fuel extraction pipe 41 extracts fuel from the lower fuel chamber and delivers it to the engine assembly's fuel supply system. Specifically, the fuel extracted from the fuel extraction pipe 41 passes through components such as the fuel filter and fuel pump before entering the engine assembly's fuel supply system.

[0038] In some embodiments, the lower fuel tank 20 is located in the middle of the fuel storage tank 10. Fuel inlets 21 are provided on both the front and rear sides of the lower fuel tank 20. Two fuel outlets 11 are spaced apart at the bottom of the fuel storage tank 10 along the front-rear direction. The two fuel outlets 11 are connected to the two fuel inlets 21 via fuel filling pipes 30. Since the lower fuel tank 20 is located below the fuel storage tank 10, under the influence of gravity, fuel flowing from the fuel outlets 11 of the fuel storage tank 10 can enter the fuel inlets 21 of the lower fuel tank 20 through the fuel filling pipes 30, thereby realizing the fuel supply operation from the fuel storage tank 10 to the lower fuel tank 20.

[0039] like Figure 3 As shown, when the fuel tank assembly is arranged longitudinally along the chassis, the lowest fuel level that can be entered into the lower fuel chamber of the lower fuel tank 20 is the plane containing the line connecting the highest point of the fuel outlet 11 and the highest point of the fuel inlet 21 of the lower fuel tank 20. This plane is the lowest fuel level when the vehicle is traveling uphill. By placing the suction end of the fuel extractor 41 below the lowest fuel level, it can be ensured that the suction end of the fuel extractor 41 can always pump fuel from the lower fuel tank 20 to the fuel supply system of the engine assembly, regardless of whether the vehicle is going uphill or downhill, thus improving fuel efficiency. Furthermore, only a small amount of dead fuel remains in the lower fuel tank 20 below the lowest fuel level. The slope formed by the lowest fuel level and the bottom of the lower fuel tank 20 is the maximum tilt angle for fuel supply of the fuel tank assembly. In addition, by adjusting the arrangement of the fuel outlet 11 of the fuel reservoir 10 and the fuel inlet 21 of the lower fuel tank 20, fuel tanks that meet the requirements of different gradients can be designed.

[0040] Furthermore, at low fuel levels, the inertia generated by vehicle acceleration / braking can cause the oil suction end of the oil suction pipe 41 to be briefly exposed above the fuel surface, resulting in cavitation. However, the lower oil chamber of the lower fuel tank 20 in this application is located much lower than the oil storage chamber. Therefore, even if there is a small amount of fuel in the entire fuel tank assembly, it will still cover the oil suction port of the oil suction pipe 41 and will not cause cavitation.

[0041] In some embodiments, the bottom of the lower oil tank 20 is provided with a first oil outlet 22, which is located at the middle of the lower oil tank 20. The bottom of the oil storage tank 10 is provided with a second oil outlet 12. The first oil outlet 22 and the second oil outlet 12 are both provided with magnetic members for adsorbing impurities. Since the fuel contains impurities, the fuel in the oil storage tank 10 can be adsorbed by the magnetic members in the second oil outlet 12 of the oil storage tank 10 before entering the lower oil tank 20. A small amount of impurities that are not adsorbed are adsorbed by the first oil outlet 22 arranged at the bottom of the lower oil cavity. In this embodiment, the first oil outlet 22 and the second oil outlet 12 realize secondary impurity filtration of the fuel entering the engine assembly, prevent the impurities in the fuel from affecting the engine assembly, and improve the service life of the engine assembly.

[0042] In some embodiments, the number of second oil outlets 12 is two and they are arranged in the front-rear direction of the oil storage tank 10. The two second oil outlets 12 are respectively arranged near the two oil outlets 11 and between the two oil outlets 11. In this embodiment, by arranging the second oil outlet 12 and the oil outlet 11, the fuel in the oil storage cavity can be preliminarily filtered by the second oil outlet 12 before flowing out of the oil outlet 11, thereby improving the quality of the fuel entering the lower oil cavity.

[0043] In some embodiments, the top of the oil storage tank 10 is also provided with a refueling port 13. In order to prevent external impurities from entering the oil storage tank 10 during use, an oil tank cover 15 is arranged on the refueling port 13, and a filter screen is arranged in the refueling port 13. When the fuel sensor 40 shows that the fuel level in the lower oil cavity is too low, the entire fuel tank assembly needs to be refueled through the refueling port 13. Since the filter screen for filtering impurities is also arranged in the refueling port 13, the quality of the fuel entering the oil storage tank 10 is improved.

[0044] In some embodiments, the top of the oil storage tank 10 is also provided with a return oil port 14, which is communicated with the engine assembly through a return oil pipeline. Figure 2 and Figure 4 As shown in the drawings, part of the fuel in the fuel supply system of the engine assembly enters the combustion chamber of the engine assembly for combustion, and the other part that does not enter the combustion chamber returns to the return oil port 14 of the oil storage tank 10 through the return oil pipeline, forming a fuel supply cycle.

[0045] In some embodiments, the lower oil tank 20 is open to the side facing the oil storage tank 10, and the lower oil tank 20 and the oil storage tank 10 are integrally connected.

[0046] Specifically, the embodiment increases a lower oil tank body 20 at the lower part on the basis of the existing fuel tank, the top of the lower oil tank body 20 is without cover, the connection between the bottom of the oil storage cavity and the lower oil cavity is holed, and the lower oil tank body 20 and the oil storage cavity can be combined into an integral whole through welding or flange (a flange is welded at the bottom of the oil storage cavity, a flange is welded at the top of the lower oil cavity, and the lower oil tank body 20 and the oil storage cavity are connected through bolts), so that the chassis space of the vehicle can be fully utilized, and the compactness of the overall layout is improved. In addition, since the main function of the lower oil tank body 20 is to transition out oil, there is no special requirement for the shape, and the shape can be flexibly designed according to the space of the vehicle, the small space is fully utilized, and the additional fuel capacity is increased.

[0047] The second aspect of the present application provides an engineering machine, comprising a chassis, an engine assembly arranged on the chassis, and the fuel tank assembly as described above. Since the engineering machine adopts all the embodiments of the fuel tank assembly described above, it has all the beneficial effects brought by the fuel tank assembly, which will not be described in detail here.

[0048] In the description of the present application, it should be understood that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0049] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present description and the features of the different embodiments or examples without contradiction.

[0051] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that those skilled in the art can make changes, modifications, substitutions and variations to the above-described embodiments within the scope of the present application.

Claims

1. A fuel tank assembly for use in construction machinery, said construction machinery including an engine assembly, characterized in that, The fuel tank assembly includes: The oil storage tank (10) has an oil storage cavity; The lower oil tank body (20) is located at the bottom of the oil storage tank body (10) and has a lower oil cavity. The longitudinal cross-sectional area of ​​the lower oil cavity is smaller than the longitudinal cross-sectional area of ​​the oil storage cavity. Fuel filling pipe (30) allows fuel in the oil storage chamber to be added to the lower oil chamber through the fuel filling pipe (30); The oil extraction assembly has one end installed on the top of the oil storage tank (10) and the other end is the oil extraction end, which extends from the oil storage chamber to the bottom of the lower oil chamber. The oil extraction assembly is used to extract fuel from the lower oil chamber into the engine assembly.

2. The fuel tank assembly according to claim 1, characterized in that, The oil extraction assembly includes a fuel sensor (40) and an oil extraction pipe (41). The fuel sensor (40) is installed on the top of the oil storage tank (10) and is used to obtain the oil level in the oil storage chamber. The oil extraction pipe (41) extends from the fuel sensor (40) into the bottom of the lower oil chamber.

3. The fuel tank assembly according to claim 2, characterized in that, The lower oil tank (20) is located in the middle of the oil storage tank (10). The lower oil tank (20) has oil inlets (21) on both the front and rear sides. The bottom of the oil storage tank (10) has two oil outlets (11) spaced apart along the front and rear direction. The two oil outlets (11) are connected to the two oil inlets (21) through the oil filling pipe (30).

4. The fuel tank assembly according to claim 3, characterized in that, The angle formed by the plane of the line connecting the highest point of the oil inlet (21) and the highest point of the oil outlet (11) with the bottom of the lower oil tank (20) is the maximum slope angle for the oil suction pipe (41) to draw oil. When the slope of the engineering machinery is not greater than the maximum slope angle, the fuel above the highest point of the oil inlet (21) can flow smoothly into the oil outlet (11).

5. The fuel tank assembly according to claim 3, characterized in that, The bottom of the lower oil tank (20) is provided with a first oil drain port (22), and the bottom of the oil storage tank (10) is provided with a second oil drain port (12). Both the first oil drain port (22) and the second oil drain port (12) are provided with magnetic adsorption components for adsorbing impurities.

6. The fuel tank assembly according to claim 5, characterized in that, The number of the second oil drain ports (12) is two and they are arranged at intervals along the front and rear direction of the oil storage tank (10). The two second oil drain ports (12) are respectively located close to the two oil outlets (11) and are located between the two oil outlets (11).

7. The fuel tank assembly according to any one of claims 1 to 6, characterized in that, The top of the oil storage tank (10) is also provided with a filling port (13), and the filling port (13) is provided with an oil tank cover (15), and a filter screen is provided inside the filling port (13).

8. The fuel tank assembly according to any one of claims 1 to 6, characterized in that, The top of the oil storage tank (10) is also provided with an oil return port (14), which is connected to the engine assembly through an oil return pipeline.

9. The fuel tank assembly according to any one of claims 1 to 6, characterized in that, The lower oil tank (20) is open on one side facing the oil storage tank (10), and the lower oil tank (20) and the oil storage tank (10) are integrally connected.

10. An engineering machinery, characterized in that, It includes a chassis, an engine assembly mounted on the chassis, and a fuel tank assembly according to any one of claims 1 to 9.

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