Novel miniature excavator plastic fuel tank and mounting structure

Abstract

The utility model discloses a novel miniature excavator plastic fuel tank and a mounting structure, which realize oil storage at the upper part and guarantee that the oil level is still in a high position when the oil liquid is less at the lower part, can adapt to the operation of an excavator in a complex terrain, and realize the firm mounting of a fuel tank body in an extremely narrow space, and adopts the specific scheme that the novel miniature excavator plastic fuel tank comprises the fuel tank body; the fuel tank body is of a special-shaped structure similar to a cuboid, and the size of the lower portion of the fuel tank is smaller than that of the upper portion. An oil discharge port and an oil suction port are formed in the lower part of the oil tank, the oil discharge port is lower than the oil suction port, and an oil return port is formed in the upper part of the oil tank; the upper portion of the oil tank is further provided with an oil filling port and an oil filling pump connector. The installation structure comprises a fuel tank body installation frame, an L-shaped pressing plate and a strap, the L-shaped pressing plate is composed of a first pressing plate body and a second pressing plate body, and the first pressing plate body and the second pressing plate body are installed in the positioning grooves in the diagonal positions of the left rear portion and the right front portion to conduct diagonal pressing installation.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering vehicles, and relates to a new type of plastic fuel tank for a micro excavator and an installation structure thereof. Background Technique

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] With the accelerated promotion of urban infrastructure construction, the projects for urban construction, pipeline construction and operation in narrow spaces are increasing day by day, and the demand for micro excavators is growing day by day. However, the obvious characteristics of micro excavators are mainly operating in complex terrains such as deep trenches and soil slopes; they are small in size and require continuous fuel supply.

[0004] At present, most of the existing fuel tanks optimize their own structures to meet the requirements of light weight and high strength. A plurality of support rods are arranged in the oil cavity of the fuel tank body, and both ends of the support rods are respectively connected to the inner wall of the fuel tank body; a plurality of annular depressions are arranged on the outer side of the fuel tank body along its length direction to improve the strength of the fuel tank. However, its bottom is a flat structure, and the oil suction port of the fuel tank is arranged at the top of the fuel tank, and the fuel is sent into the oil circuit through an oil pump, which solves the problem that fuel will not occur. However, the existing structure cannot cope with the situation that the oil suction port cannot pump oil when the fuel tank is tilted; at the same time, the installation of the fuel tank mainly uses a structure of a bracket and an integrated strap for installation. However, the current installation structure requires the strap to be completely wound around the fuel tank and the two ends of the strap to be fixed and tightened. This structure requires a large installation space and is not conducive to improving the utilization rate of the fuel tank installation space. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a new type of plastic fuel tank for a micro excavator and an installation structure thereof. The lower part of the fuel tank body has a smaller volume than the upper part, realizing oil storage in the upper part and ensuring that the oil level is still at a high level when the oil is less in the lower part, which can effectively adapt to the operation of the excavator in complex terrains. At the same time, the fuel tank body is installed in a narrow space through two independent L-shaped pressing plates.

[0006] In order to achieve the above purpose, the utility model is realized through the following technical solutions:

[0007] A new type of plastic fuel tank for a micro excavator includes a fuel tank body; the fuel tank body is integrally formed by blow molding, the fuel tank body is in a special-shaped structure similar to a cuboid, and the lower part of the fuel tank body has a smaller volume than the upper part;

[0008] A drain port and an oil suction port are arranged at the lower part of the fuel tank body, and the drain port is lower than the oil suction port. A return oil port is arranged at the upper part of the fuel tank body;

[0009] An upper part of the fuel tank body is further provided with a fuel filling port and a fuel pump interface.

[0010] Furthermore, the drain port is located at the lowest position of the fuel tank body, and is used for discharging the remaining fuel and impurities in the fuel.

[0011] Furthermore, a connecting pipe is arranged between the fuel filling port and the fuel tank body, and an anti-theft fuel tank lock cover is arranged on the fuel filling port.

[0012] Furthermore, the fuel pump interface is arranged on the fuel tank body at the connection position of the connecting pipe and the fuel tank body, and is used for connecting an in-vehicle fuel pump or a non-vehicle fuel pump.

[0013] Furthermore, a capacitive fuel quantity sensor is arranged on the top of the fuel tank body, and is used for fuel quantity detection and alarm.

[0014] Furthermore, positioning grooves are further arranged at diagonal positions of the left rear and the right front on the top shell of the fuel tank body.

[0015] An installation structure of a plastic fuel tank for a new type of micro-excavator includes a fuel tank body mounting bracket and an L-shaped pressing plate. The L-shaped pressing plate is composed of a first pressing plate and a second pressing plate. The first pressing plate and the second pressing plate are installed in the positioning grooves at diagonal positions of the left rear and the right front of the fuel tank body for diagonal pressing installation.

[0016] Furthermore, both the first pressing plate and the second pressing plate are steel plates with through holes arranged at one end, and are fixed to the fuel tank body mounting bracket through bolts.

[0017] Furthermore, a hoop band is further included. The hoop band is an L-shaped steel band. One end of the hoop band is provided with a hook and is directly hung on the fuel tank body mounting bracket of the excavator, and the other end is provided with a stud and is tightened with the fuel tank body mounting bracket through a nut.

[0018] Furthermore, the hoop band is arranged at the middle horizontal position between the left side and the front of the fuel tank body to perform two-way positioning on the left side and the front side of the fuel tank body.

[0019] The beneficial effects of the above-mentioned utility model are as follows:

[0020] The fuel tank body of the utility model is a special-shaped structure similar to a cuboid. The volume of the lower part of the fuel tank body is smaller than that of the upper part, so as to realize oil storage in the upper part and ensure that the oil level is still at a high level when there is less oil in the lower part, which can effectively adapt to the operation of the excavator in complex terrains. At the same time, by setting the oil suction port at the lower part of the fuel tank body, when the fuel tank is refueled again, the fuel will enter the oil circuit under the action of gravity, effectively solving the problem that the fuel transfer pump cannot automatically resume pumping after the oil circuit enters air after the excavator runs out of fuel, without the need for the driver to manually exhaust the oil circuit through the fuel transfer pump, realizing the solution of the problems of insufficient supply of a small amount of fuel in complex terrains and inability to automatically resume supply with a simple structure. The oil return port of the fuel tank body is set at the upper part of the fuel tank body, and the position of the oil return port has a certain distance from the position of the oil suction port, effectively preventing the fuel temperature at the oil suction port from being too high, resulting in insufficient fuel supply and a decrease in engine power.

[0021] The installation position of the fuel tank body of this application is relatively narrow. By setting two L-shaped pressing plates, the ends of the two pressing plates without through holes are inserted into the gap formed between the upper part of the fuel tank body and the frame of the excavator from the left and right sides of the fuel tank body. Subsequently, the ends of the two pressing plates provided with through holes are fixed with bolts. The first pressing plate is arranged at the rear half of the fuel tank body, and the second pressing plate is arranged at the front half of the fuel tank body. The first pressing plate and the second pressing plate are arranged diagonally. The hoop band is connected to the fuel tank body mounting bracket of the excavator through a hook from the left rear side of the fuel tank body and is tightened through a nut at the right front, performing two-way positioning and restriction on the left side and the front side of the fuel tank body, enabling the fuel tank body to be installed in a narrow space and more stably. Description of the Drawings

[0022] The specification drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0023] Figure 1 It is a diagram of the plastic fuel tank of the micro-excavator of the present utility model;

[0024] Figure 2 It is a front view of the plastic fuel tank of the micro-excavator of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the first pressing plate of the present utility model.

[0026] In the figure: 1 is the fuel tank body, 2 is the oil drain port, 3 is the oil suction port, 4 is the oil return port, 5 is the fuel tank cap, 6 is the fuel filling port, 7 is the connecting pipe, 8 is the fuel pump interface, 9 is the capacitive fuel quantity sensor, 10 is the hoop band, 11 is the first pressing plate, and 12 is the second pressing plate. Detailed Description of the Invention

[0027] It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0028] Embodiment 1

[0029] This embodiment discloses a new type of plastic fuel tank for a mini excavator. As Figures 1-3 shown, it includes a fuel tank body 1; the fuel tank body 1 is integrally formed by blow molding, featuring light weight and high strength; the fuel tank body 1 has a special-shaped structure similar to a cuboid, with the lower volume of the fuel tank body 1 smaller than the upper volume. When the remaining fuel is less, it can make the oil level in the fuel tank body 1 at a higher position, preventing the excavator from running out of fuel. At the same time, an oil drain port 2 and an oil suction port 3 are provided at the lower part of the fuel tank body 1, and the oil drain port 2 is lower than the oil suction port 3. Setting the oil suction port 3 at the lower part of the fuel tank body 1 can effectively prevent the situation that the oil circuit enters air after the excavator runs out of fuel, resulting in the inability of the fuel transfer pump to automatically resume pumping; the oil drain port 2 is set at a position lower than the oil suction port 3, which can effectively discharge the impurities in the oil fluid and prevent them from being sucked out from the oil suction port 3, causing blockage of the fuel delivery system; an oil filling port 6 is provided at the upper part of the fuel tank body 1, a connecting pipe 7 is provided between the oil filling port 6 and the fuel tank, and an oil tank cap 5 is provided on the oil filling port 6. The oil tank cap 5 is selected as an anti-theft oil tank lock cap; a fuel pump interface 8 is also provided around the connecting pipe 7 for connecting an on-vehicle fuel pump to solve the problem of slow refueling speed and reduced work efficiency.

[0030] The fuel tank body 1 is integrally formed of plastic and has a special-shaped structure similar to a cuboid, with the lower volume of the fuel tank body 1 smaller than the upper volume. Thus, it realizes storing fuel in the upper part and ensuring that the oil level is still at a high level when the oil fluid is less in the lower part, which can effectively adapt to the operation of the excavator in complex terrains. At the same time, combined with setting the oil suction port 3 at the lower part of the fuel tank body 1, when the fuel tank is refueled again, the fuel will enter the oil circuit under the action of gravity, effectively solving the problem that the fuel transfer pump cannot automatically resume pumping after the oil circuit enters air when the excavator runs out of fuel, and there is no need for the driver to manually exhaust the oil circuit through the fuel transfer pump, realizing the solution of the problems of insufficient supply of a small amount of fuel in complex terrains and inability to automatically resume supply with a simple structure.

[0031] An oil drain port 2 is also provided near the oil suction port 3, and the oil drain port 2 is lower than the oil suction port 3. The oil drain port 2 is at the lowest position of the fuel tank body 1, used to discharge the remaining fuel and the impurities in the fuel, and also effectively prevents the impurities from entering the oil circuit from the oil suction port 3, causing oil circuit blockage; in addition, due to the relatively high return oil temperature, the return oil port 4 of the fuel tank body 1 is provided at the upper part of the fuel tank body 1, and the position of the return oil port 4 is far from the position of the oil suction port 3, effectively preventing the fuel temperature at the oil suction port 3 from being too high, resulting in insufficient fuel supply and a decrease in engine power.

[0032] On the upper part of the fuel tank body 1, there are also a fuel filling port 6 and a fuel pump interface 8. A connecting pipe 7 is arranged between the fuel filling port 6 and the fuel tank. A fuel tank cap 5 is arranged on the fuel filling port 6, and the fuel tank cap 5 is a theft-proof fuel tank lock cap. Around the connecting pipe 7, there is also a fuel pump interface 8 for connecting an in-vehicle fuel pump or a non-vehicle fuel pump. There are two fuel filling ways, through the fuel filling port 6 or the fuel pump interface 8, which solves the problem of slow fuel filling speed.

[0033] Embodiment 2

[0034] This embodiment discloses an installation structure of a new type of plastic fuel tank for a micro excavator, including an L-shaped pressing plate and a hoop 10. The fuel tank described above is a special fuel tank applied to a micro excavator. A micro excavator has two characteristics. The first characteristic is its small size, and the second characteristic is the need to continuously use fuel. In other words, the fuel tank on a micro excavator needs to be both small in size and large in volume. The L-shaped pressing plate includes a first pressing plate 11 and a second pressing plate 12. Both the first pressing plate 11 and the second pressing plate 12 are steel plates with through holes at one end and are fixed by bolts. The hoop 10 is an L-shaped steel belt with a hook at one end that can be directly hung on the mounting bracket of the fuel tank body 1 of the excavator (the mounting bracket and the frame of the excavator are not shown in the figure), and a stud at the other end. A nut is used to tighten the hoop 10.

[0035] The L-shaped pressing plates are arranged on both sides of the fuel tank body 1. The first pressing plate 11 is arranged on the left side of the fuel tank body 1, and the second pressing plate 12 is arranged on the right side of the fuel tank body 1. The end of the first pressing plate 11 without a through hole is pressed on the fuel tank body 1, and the other end is fixed to the mounting bracket of the fuel tank body 1 of the excavator by bolts. The installation position of the fuel tank body 1 is relatively narrow. During the installation process, only the ends of the first pressing plate 11 and the second pressing plate 12 without through holes can be inserted into the gap formed between the upper part of the fuel tank body 1 and the excavator frame from the left and right sides of the fuel tank body 1, and then fixed with bolts. The first pressing plate 11 is arranged in the rear half of the fuel tank body 1, and the second pressing plate 12 is arranged in the front half of the fuel tank body 1. The first pressing plate 11 and the second pressing plate 12 are diagonally arranged, making the installation of the fuel tank body 1 more stable. The hoop 10 is connected to the mounting bracket of the fuel tank body 1 of the excavator through a hook from the left rear side of the fuel tank body 1, and is tightened by a nut at the right front to prevent the fuel tank body 1 from moving back and forth.

[0036] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the protection scope of the present invention. Those skilled in the art should understand that various modifications or deformations that can be made without creative efforts on the basis of the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A new type of plastic fuel tank for a mini excavator, characterized in that, It includes a fuel tank body; the fuel tank body is integrally formed by blow molding, the fuel tank body has a special-shaped structure similar to a cuboid, and the volume of the lower part of the fuel tank body is smaller than that of the upper part; A drain port and a suction port are provided at the lower part of the fuel tank body, and the drain port is lower than the suction port, and a return port is provided at the upper part of the fuel tank body; A fuel filling port and a fuel pump interface are also provided at the upper part of the fuel tank body.

2. The novel plastic fuel tank for a mini-excavator according to claim 1, characterized in that, The drain port is at the lowest position of the fuel tank body, and is used for discharging the remaining fuel and impurities in the fuel.

3. A novel plastic fuel tank for a mini excavator as claimed in claim 1, characterized in that, A connecting pipe is provided between the fuel filling port and the fuel tank body, and an anti-theft fuel tank lock cover is provided on the fuel filling port.

4. A novel plastic fuel tank for a mini excavator according to claim 1, characterized in that, The fuel pump interface is provided on the fuel tank body at the connection of the connecting pipe and the fuel tank body, and is used for connecting an in-vehicle fuel pump or a non-vehicle fuel pump.

5. A novel plastic fuel tank for a mini excavator as claimed in claim 1, characterized in that, A capacitive fuel quantity sensor is provided on the top of the fuel tank body, and is used for fuel quantity detection and alarm.

6. The novel plastic fuel tank for a mini-excavator according to claim 1, characterized in that, Positioning grooves are also provided at the diagonal positions of the left rear and right front of the top shell of the fuel tank body.

7. The installation structure of a new type of plastic fuel tank for a mini excavator according to any one of claims 1-6, characterized in that, It includes a fuel tank body mounting bracket and an L-shaped pressing plate. The L-shaped pressing plate is composed of a first pressing plate and a second pressing plate. The first pressing plate and the second pressing plate are installed in the positioning grooves at the diagonal positions of the left rear and right front of the fuel tank body for diagonal pressing and installation.

8. The installation structure according to claim 7, wherein Both the first pressing plate and the second pressing plate are steel plates with through holes at one end, and are fixed to the fuel tank body mounting bracket by bolts.

9. The installation structure according to claim 7, wherein, It also includes a hoop. The hoop is an L-shaped steel strip. One end of the hoop is provided with a hook and is directly hung on the fuel tank body mounting bracket of the excavator, and the other end is provided with a stud and is tightened with the fuel tank body mounting bracket through a nut.

10. The mounting structure according to claim 9, wherein, The hoop is provided at the middle horizontal position between the left side and the front of the fuel tank body, and performs two-way positioning on the left side and the front side of the fuel tank body.

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