JP2004217141A - Fuel tank of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel tank of a construction machine capable of filtering fuel supplied from a refueling pump with a strainer mounted to a refueling port. <P>SOLUTION: In the fuel tank of the construction machine, the cylindrical refueling port 20 having a removable cap 21 mounted to an opening 20a and includes the strainer 23 for filtering a foreign matter in the fuel supplied from the opening 20a within it is disposed in the upper part of a tank body 18. The fuel tank has the refueling pump 28 for feeding the fuel stored in a drum or the like to the tank body 18, and the discharge side of the refueling pump 28 is connected to the refueling port 20 over the strainer 23. The foreign matter of the fuel supplied from the refueling pump 28 to the refueling port 20 is filtered by the strainer 23 disposed in the refueling port 20 and the fuel is then stored in the tank body 18, so that a foreign matter can be certainly prevented from intruding into the tank body 18 even when the foreign matter intrudes into the fuel stored in the drum or the like. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
The present invention relates to a fuel tank for a construction machine that prevents foreign matter from entering the tank body when fuel stored in a drum or the like is supplied to the tank body.
[0002]
[Prior art]
Conventionally, construction machines such as hydraulic excavators are equipped with a fuel tank for storing fuel used for a power source such as an engine, and the fuel tank can be supplied with fuel directly from a tank lorry or a gas station. In addition, a refueling port is provided at the top of the tank body.
In addition, a mesh-shaped strainer is provided at the refueling port to prevent foreign matter from entering the tank body at the time of refueling. As this type of strainer, for example, the one described in Patent Document 1 is known.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 8-155222
The filler filler strainer described in Patent Literature 1 filters foreign substances mixed in fuel supplied from the filler port by a strainer body formed in a cylindrical shape by a mesh body, and foreign substances are mixed in the tank body. In addition, a liquid level detecting mechanism is provided on the strainer body to detect the level of the liquid level during refueling.
[0005]
On the other hand, construction machines that often work on site often run out of fuel during the operation, and therefore often supply fuel from drums or the like stored at the work site.
For this reason, as shown in FIGS. 6 and 7, the construction machine is equipped with a small oil supply pump a, and the oil supply pump a can supply fuel directly to the tank body b from a drum or the like. A refueling hose c is connected to a suction side of the refueling pump a.
The refueling hose c is stored in the utility space d or the like in a wound state as shown in FIG. 7 so as not to be in the way when not in use, and the discharge side of the refueling pump a is connected to the tank body b by a fuel pipe e. As shown in FIG.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional fuel tank, when fuel is supplied from the filler port of the fuel tank, the foreign matter is filtered by the strainer provided in the filler port.Therefore, there is no concern that the foreign matter is mixed into the tank body b. When the stored fuel is supplied to the tank body b by the fuel pump a mounted on the construction machine, the fuel is directly supplied into the tank body b without passing through the strainer provided at the filler port. There is a concern that foreign matter may be mixed into
In particular, foreign substances such as dust mixed in the refueling hose c during the work are often refueled into the tank body b together with the fuel in addition to the fact that foreign substances are often mixed in the fuel stored in the drum can or the like. Foreign matter causes problems such as malfunction of the engine and failure of the engine.
[0007]
Further, in the conventional fuel tank in which the fuel pipe e is connected to the upper part of the tank body b, a part of the fuel in the tank body b flows backward from the fuel pipe e to the refueling pump a due to vibration during traveling or work, and Since the fuel may flow out of the fueling hose c into the utility space d, there are also problems such as the utility space d being polluted by the leaked fuel and a fire such as a cigarette being ignited by the leaked fuel to cause a fire. .
[0008]
The present invention has been made to solve such a conventional problem.Therefore, the present invention provides a fuel tank for construction machinery in which fuel supplied from a refueling pump can be filtered by a strainer provided at a refueling port. It is an object of the present invention to reliably prevent foreign substances from entering the inside.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a fuel tank for a construction machine according to the present invention has a tubular shape in which a detachable cap is attached to an opening and a strainer for filtering foreign matter in fuel supplied from the opening is provided inside. A fuel tank for a construction machine having a refueling port at an upper part of the tank body, wherein a refueling pump for refueling the tank body with fuel stored in a drum or the like is provided, and a discharge side of the refueling pump is refueled above the strainer. It is connected to the mouth.
[0010]
With the above configuration, the fuel supplied to the filler port by the filler pump is contained in the tank body after foreign substances in the fuel are filtered by the strainer provided in the filler port, and thus the fuel stored in the drum can or the like. Even if foreign matter is mixed in the tank or foreign matter such as dust is mixed in the oil supply hose, it is possible to reliably prevent foreign matter from being mixed in the tank body, thereby causing the engine to malfunction due to foreign matter mixed in the fuel. Or failure can be prevented from occurring.
In addition, the strainer that filters foreign substances in the fuel when refueling from the opening of the refueling port can also be used as the strainer that filters foreign substances in the fuel that is refueled by the refueling pump, so that there is no need to provide a new strainer. In addition to reducing fuel costs, the fuel from the refueling pump is supplied to the refueling port from above the strainer. The fuel in the tank body does not flow back to the refueling pump side to the refueling pump side, so that the fuel flowing back causes the surroundings of the refueling pump to become dirty, and the spilled fuel ignites a cigarette or other fire, causing a fire. There is no need to worry.
[0011]
In order to achieve the above object, a fuel tank for a construction machine according to the present invention is provided with a utility space near a tank body, a fueling pump installed in the utility space, and a fueling hose connected to a suction side of the fueling pump provided with a utility. It is housed in the space so that it can be taken out.
[0012]
With the above configuration, the oil supply hose can be stored compactly in the utility space, so that there is no need to worry about damaging the oil supply hose during work, and to prevent dust from adhering to the oil supply hose and foreign substances inside the oil supply hose. Mixing can be prevented.
[0013]
In order to achieve the above object, a fuel tank of a construction machine according to the present invention is provided with a rectifying plate near an opening of a filler port for preventing fuel supplied from a filler pump from flowing back to the opening side. .
[0014]
According to the above configuration, even if the filler cap is removed and refueled, fuel does not leak from the opening of the filler port, and the fuel can be supplied while looking at the liquid level gauge provided in the filler port. The fuel does not overflow from the opening.
[0015]
In order to achieve the above object, a fuel tank of a construction machine according to the present invention is provided with a revolving superstructure on which a working machine, a driver's cab, a power engine and the like are mounted on a self-propelled lower traveling body, The upper revolving unit is equipped with a tank body with a tubular oil supply port at the top, with a detachable cap attached to the opening and a strainer inside which is provided with a strainer for filtering foreign substances in fuel supplied from the opening. A utility space near the tank body, a fuel pump for supplying fuel stored in drums and the like to the tank body is installed in the utility space, and the fuel pump discharges the fuel tank. Side is connected to the oil supply port above the strainer, and the oil supply hose connected to the suction side of the oil supply pump can be taken out into the utility space. It is those that were housed.
[0016]
With the above configuration, the fuel supplied to the filler port by the filler pump is contained in the tank body after foreign substances in the fuel are filtered by the strainer provided in the filler port, and thus the fuel stored in the drum can or the like. Even if foreign matter such as dust is mixed in the tank, or foreign matter such as dust is mixed in the refueling hose, it is possible to reliably prevent foreign matter from being mixed in the tank body. Can be prevented from becoming malfunctioning or failing.
In addition, the strainer that filters foreign substances in the fuel when refueling from the opening of the refueling port can also be used as the strainer that filters foreign substances in the fuel that is refueled by the refueling pump, so that there is no need to provide a new strainer. In addition to reducing fuel costs, the fuel from the refueling pump is supplied to the refueling port from above the strainer. The fuel in the tank body does not flow back to the refueling pump side to the refueling pump side, so that the fuel flowing back causes the surroundings of the refueling pump to become dirty, and the spilled fuel ignites a cigarette or other fire, causing a fire. There is no need to worry.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
1 is an overall side view of the hydraulic shovel, FIG. 2 is a plan view of the vicinity of the fuel tank, FIG. 3 is a front view of the fuel tank, FIG. 4 is a perspective view of the fuel tank, and FIG. 5 is a line AA in FIG. FIG.
[0018]
The hydraulic excavator shown in FIG. 1 includes a lower traveling body 1 that is free to travel, and an upper revolving body 2 that is rotatably mounted on the lower traveling body 1.
The undercarriage 1 has a track frame 3 composed of a center frame 3a and a pair of side frames 3b provided on both sides of the center frame 3a, and an idler 4 is provided at one end of each side frame 3b. A sprocket 5 which is supported so as to be able to move back and forth freely and is rotatably driven by a traveling motor (not shown) composed of a hydraulic motor is provided on the other end side.
An endless crawler belt 6 is wound between the idler 4 and the sprocket 5, and by driving the crawler belt 6 with the sprocket 5, the lower traveling body 1 can run on its own and a side track is provided. A plurality of rolling wheels 7 are rotatably supported on the upper and lower portions of 3b.
[0019]
The upper revolving superstructure 2 rotatably mounted on the center frame 3a of the truck frame 3 has a vehicle body frame 8, and is protruded upward in a substantially central shape at the front center of the vehicle body frame 8. A pair of working machine support brackets 8a is provided, and a shaft pin (not shown) for supporting the lower end of the boom 11 constituting the working machine 10 is inserted from the side into a pin hole 8b drilled on the upper side. ing.
As shown in FIG. 1, the working machine 10 has a base end pivotally attached to a work implement support bracket 8 a and a boom 11 which can be raised and lowered by a boom cylinder 12, a base end side pivotally attached to a distal end of the boom 11, and an arm. An arm 14 is rotatable by a cylinder 13, and a bucket 16 is pivotally attached to the tip of the arm 14 and is rotatable by a bucket cylinder 15.
[0020]
On the other hand, a driver's cab 17 is installed on one side of the work implement support bracket 8a at the front of the body frame 8, and a tank body 18 is installed on the other side. An engine room 21 covered by a hood cover 20 is provided, and a power engine (not shown) is accommodated in the engine room 21. A counterweight 22 is attached to the rear end of the body frame 10. I have.
[0021]
As shown in FIG. 4, the tank main body 18 installed on the side of the working machine support bracket 8a has an outer plate 18a that is outside with respect to the turning direction, an inner plate 18b that is inside, and an upper plate that forms the upper surface. 18c, a bottom plate 18d forming a bottom surface, and front and rear side plates 18e and 18f forming front and rear surfaces are formed in a substantially square box shape.
Each of the plates 18a to 18f is made of, for example, a metal plate having the same thickness. The outer plate 18a and the upper plate 18b are connected to each other by a curved corner 18g, and the upper plate 18c is connected to the corner 18g. A cylindrical oil filler port 20 having an open upper end surface is provided at a position protruding upward.
[0022]
A cap 21 is removably attached to the opening 20a of the filler port 20, and a partition plate 22 is fixed in the filler port 20 at a substantially intermediate portion by welding or the like.
A strainer mounting hole 22a is opened at the center of the partition plate 22, and a strainer 23 is inserted into the tank body 18 through the strainer mounting hole 22a.
As shown in FIG. 5, the strainer 23 is formed in a tapered shape in which the lower end side becomes gradually smaller in diameter, the periphery and the bottom surface are formed by a net 23a, and a flange 23b is attached to an opening on the upper surface.
[0023]
A flange 23c is formed on the outer periphery of the flange 23b so as to engage with the strainer mounting hole 22a from above. The guide rod 24a of the liquid level gauge 24 is provided in a guide hole 23d formed in the flange 23c. Are slid up and down freely.
The liquid level gauge 24 detects the liquid level of the fuel contained in the tank body 18, and a stopper 24b is provided at the upper end of the guide rod 24a so as to prevent the guide rod 24a from falling down. The lower end of the guide rod 24a is vertically slidably supported by a guide portion 23e projecting from the bottom of the strainer 23b, and a spherical float 24c is fixed to the lower end of the guide rod 24a. .
[0024]
On the other hand, a utility space 27 covered by an openable / closable cover 26 is provided on the front side of the tank body 18, and a small fuel pump 28 is installed at the bottom of the utility space 27.
The fuel pump 28 is driven to rotate by an electric motor 29, and a fueling hose 30 having an appropriate length is connected to the suction port 28a.
The refueling hose 30 is for sucking up the fuel stored in a drum or the like, and has a metal suction port 31 with a strainer (not shown) installed therein at the end thereof, as shown in FIG. 2 when not in use. Is stored in the utility space 27 in a state of being wound in a thorn shape.
Further, one end of a fuel pipe 32 is connected to a discharge port 28b of the fuel pump 28, and the other end of the fuel pipe 32 passes between the work implement support bracket 8a and the tank body 18 as shown in FIG. After being piped above the tank main body 18, it is connected to a pump connection port 33 protruding from an outer peripheral surface between the opening 20 a of the oil supply port 20 and the partition plate 22 as shown in FIG. 5.
[0025]
Next, the operation of the fuel tank configured as described above will be described.
When fuel is supplied from a tank lorry or a gas station, the cap 21 of the fuel supply port 20 protruding from the upper surface of the tank body 18 is removed, and the fuel is supplied into the tank body 18 through the opening 20a of the fuel supply port 20. However, the refueled fuel is stored in the tank main body 18 after being filtered by the strainer 23, so that no foreign matter enters the tank main body 18.
Further, as the liquid level of the fuel supplied into the tank body 18 rises, the float 24c floating on the liquid level rises, so that the mark (not shown) provided on the guide rod 24a reaches a predetermined position. By stopping refueling at this point, there is no fear that fuel will overflow from the opening 20a of the refueling port 20.
[0026]
On the other hand, when fuel is supplied by a drum or the like stored at a work site or the like, the fuel supply hose 30 is taken out from the utility space 27, the suction port 31 is put into the drum, the fuel pump 28 is driven, and the fuel pump is driven. 28 sucks up the fuel in the drum.
The fuel discharged from the fuel pump 28 to the fuel pipe 32 flows into the upper part of the partition plate 22 from a pump connection port 33 protruding from the outer peripheral surface of the fuel supply port 20, and is filtered by the strainer 23 to be filtered. Even if foreign matter is mixed in the fuel, the foreign matter is not removed by the strainer 23 and mixed into the tank main body 18, thereby causing the engine to malfunction due to the foreign matter mixed in the fuel, Failure can be prevented beforehand.
Also, when the fuel is removed by removing the cap 21 of the oil filler port 20, the guide rod 24a rises together with the float 24c as the liquid level in the tank body 18 rises, so that the mark provided on the guide rod 24a is at a predetermined position. By stopping the fuel pump 28 when it has reached, there is no fear that fuel will overflow from the opening 20a of the fuel filler 20.
[0027]
When refueling is completed as described above, the cap 21 is attached to the refueling port 20 to start the work. However, even if the fuel level in the tank body 18 changes due to vibration during the work or running, the pump connection is stopped. Since the port 33 is located above the partition plate 22, a part of the fuel does not flow backward to the fuel pump 28 side.
When fuel is supplied into the tank main body 18 by the fuel pump 28, the fuel can be supplied while the cap 21 is left. However, when the fuel is supplied while the liquid level is detected by the liquid level meter 24, the cap 21 is supplied. I will remove it.
At this time, in order to prevent a part of the fuel flowing into the fuel supply port 20 from the pump connection port 33 from flowing back to the opening 20a side of the fuel supply port 20, the pump connection port 33 as shown by the phantom line in FIG. A rectifying plate 34 may be provided inside the fin to prevent backflow of fuel.
Further, in the above-described embodiment, the fuel tank of the hydraulic shovel has been described. However, it is needless to say that the present invention can be applied to all fuel tanks installed in construction machines.
[0028]
【The invention's effect】
As described above in detail, the present invention provides a tank having a tubular oil supply port provided with a detachable cap attached to an opening and provided with a strainer inside for filtering foreign substances in fuel supplied from the opening. A refueling pump is provided near the main unit to refuel the tank body with fuel stored in a drum, etc., and the discharge side of the refueling pump is connected to the refueling port above the strainer. The collected fuel is stored in the tank body after foreign matter in the fuel is filtered by a strainer provided in the fuel supply port, so that foreign matter is mixed in the fuel stored in the drum or the like, or the fuel in the fuel supply hose. Even if foreign matter such as dust is mixed in the tank, it is possible to reliably prevent foreign matter from being mixed into the tank body, thereby causing the engine to malfunction due to foreign matter mixed in the fuel. Made or, it is possible to prevent the failure to in advance.
[0029]
In addition, the strainer that filters foreign substances in the fuel when refueling from the opening of the refueling port can also be used as the strainer that filters foreign substances in the fuel that is refueled by the refueling pump, so that there is no need to provide a new strainer. In addition to reducing fuel costs, the fuel from the refueling pump is supplied to the refueling port from above the strainer. The fuel in the tank body does not flow back to the refueling pump side to the refueling pump side, which causes the fuel that has flowed back to contaminate the area around the refueling pump, or that the leaked fuel ignites a cigarette or other fire, causing a fire There is no need to worry.
[0030]
In addition, a utility space is provided near the tank body, and a refueling pump is installed in the utility space, and a refueling hose connected to the suction side of the refueling pump is housed in the utility space so that it can be freely taken out. The refueling hose can be stored compactly, so there is no need to worry about damaging the refueling hose during work and preventing dust from adhering to the refueling hose and foreign matter from entering the inside. If a rectifying plate is provided near the opening of the filler port to prevent the fuel supplied from the filler pump from flowing back to the opening side, the filler port can be removed even if the filler cap is removed and refueled. Fuel does not leak from the opening of the refueling port, and refueling can be performed while looking at the level gauge provided in the refueling port. That there is no overflowing fuel from the mouth.
[Brief description of the drawings]
FIG. 1 is a side view of a construction machine equipped with a fuel tank according to an embodiment of the present invention.
FIG. 2 is a plan view showing a fuel tank of the construction machine according to the embodiment of the present invention.
FIG. 3 is a front view showing a fuel tank of the construction machine according to the embodiment of the present invention.
FIG. 4 is a perspective view showing a fuel tank of the construction machine according to the embodiment of the present invention.
FIG. 5 is a sectional view taken along line AA of FIG. 2;
FIG. 6 is a plan view showing a fuel tank of a conventional construction machine.
FIG. 7 is a front view showing a fuel tank of a conventional construction machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 10 Work implement 17 Operator's cab 18 Tank body 20 Refueling port 20a Opening 21 Cap 23 Strainer 27 Utility space 28 Refueling pump 30 Refueling hose 34 Straightening plate

Claims (4)

A fuel tank for a construction machine having a tubular filler port provided at an upper portion of a tank body and having a detachable cap attached to the opening and a strainer provided therein for filtering foreign matter in fuel supplied from the opening. A construction machine, characterized in that a refueling pump for supplying fuel stored in a drum or the like to the tank body is provided, and a discharge side of the refueling pump is connected to the refueling port above the strainer. Fuel tank. A utility space is provided in the vicinity of the tank main body, the oil supply pump is installed in the utility space, and an oil supply hose connected to a suction side of the oil supply pump is housed in the utility space so as to be freely taken out. Item 2. A fuel tank for a construction machine according to item 1. The fuel tank for a construction machine according to claim 1, further comprising: a rectifying plate provided near an opening of the filler port for preventing fuel supplied from the filler pump from flowing back to the opening side. On a self-propelled lower traveling body, an upper revolving body on which a working machine, a driver's cab, a power engine, and the like are mounted is provided so as to be freely rotatable. A fuel tank for a construction machine having a tank main body having a cylindrical fuel supply port provided at an upper portion provided with a strainer for filtering foreign matters in fuel supplied from the opening through the opening, and near the tank main body. A fuel supply pump for supplying fuel stored in a drum or the like to the tank main body, and a discharge side of the fuel supply pump above the strainer in the utility space. And the oil supply hose connected to the suction side of the oil supply pump is detachably housed in the utility space. Fuel tank of construction machinery to be.

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