JP2006001450A - Fuel oil supply device in construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a need of accommodating an oil supply pump, and a need of a hose for communicating the oil supply pump 14 with a fuel tank 8 at the time of not supplying fuel, when an oil supply pump for supplying the fuel to the fuel tank 8 is installed to a hydraulic shovel. <P>SOLUTION: While an oil pump is mounted to an oil supply port of a fuel tank 8 as a cap of the oil supply port, an oil supply hose 21 and a power source cord 19 are connected with the oil supply pump 14 at the time of supplying the fuel. The oil supply pump 14 is driven by the operation of a switch 20 to supply the fuel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of fuel refueling devices in construction machines such as hydraulic excavators.

In general, construction machines such as hydraulic excavators have a low traveling speed and sometimes work in remote areas such as mountainous areas, so that they are refueled at a fueling station (gasoline station) that refuels vehicles such as automobiles. Are rare and often refuel on site. If such a site can accommodate a fuel tanker vehicle, fuel can be supplied from the fuel tanker vehicle, but there are some severe sites where the fuel tanker vehicle is not available or cannot be entered. In some cases, a fuel container such as a drum can is carried to the site, and fuel in the fuel container is supplied using a fuel pump mounted on a construction machine.
For example, the fuel pump is mounted on the construction machine in this way. For example, the fuel pump is disposed in the vicinity of the fuel tank mounted on the vehicle body of the construction machine, and a pipe connected to the discharge port of the fuel pump is connected to the fuel tank. It is known that fuel is supplied by driving a pump in a state where a pipe communicating with a tank and connected to a fuel supply port of a fuel pump is inserted into a fuel container (Patent Documents 1, 2, and 3). reference).
JP 2002-180497 A JP 2002-180497 A JP 2002-266377 A

  However, in the above-mentioned conventional one, not only two pipes are required, that is, a pipe from the fuel pump to the fuel tank and a pipe from the fuel pump to the fuel container, but these two pipes and the fuel pump are connected. There is a problem that a large storage space must be secured in the aircraft in a state where it cannot be seen from the outside at all times, and there is a problem to be solved here.

The present invention has been created in view of the above-described circumstances in order to solve these problems, and the invention of claim 1 is for supplying fuel to a fuel tank provided in a traveling machine body. A fuel supply apparatus for a construction machine having a fuel supply pump, wherein the fuel supply pump is detachably attached to a fuel supply port provided in a fuel tank.
According to a second aspect of the present invention, in the first aspect, the oil supply pump is detachably attached with an oil supply hose for connecting between the oil supply pump and a storage tank in which fuel to be supplied is stored. This is a fuel refueling device for a construction machine.
A third aspect of the present invention is the construction machine according to the first or second aspect, wherein the fuel supply pump is provided with a detection sensor for detecting that the fuel supplied to the fuel tank is full. In FIG.
According to a fourth aspect of the present invention, in the third aspect, the fuel supply pump in the construction machine is characterized in that the fuel supply pump is configured to stop fuel supply based on detection of a full tank of the detection sensor.
A fifth aspect of the present invention is the fuel refueling apparatus in the construction machine according to the first, second, third, or fourth aspect, wherein a strainer is provided at a fuel discharge port of the fuel pump.
A sixth aspect of the present invention is the fuel for a construction machine according to the first, second, third, fourth or fifth aspect, wherein the power cord provided in the fuel pump is detachably connected to the fuel pump. It is a fueling device.

According to the first aspect of the present invention, the oil pump can be kept attached to the fuel filler port of the fuel tank, so that the storage of the fuel pump is unnecessary and the hose for communicating the fuel pump and the fuel tank is provided. Is also unnecessary.
By setting it as invention of Claim 2, the oil supply hose which connects between an oil supply pump and a storage tank can be removed from an oil supply pump.
By setting it as invention of Claim 3, the detection sensor for detecting a full tank will be provided in a fuel pump, and it is not necessary to attach a detection sensor to a fuel tank separately.
By setting it as invention of Claim 4, when it becomes full, an oil supply tank can be stopped automatically.
By setting it as invention of Claim 5, it can prevent that a foreign material enters into a fuel tank.
According to the sixth aspect of the present invention, when the supply pump is not used, it is not disturbed if the power cord is removed and stored.

Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a traveling body of a hydraulic excavator. The traveling body 1 includes a lower traveling body 2 of a crawler traveling type, an upper revolving body 3 that is pivotably provided on the lower traveling body 2, and the upper revolving body 3. It is conventional that the apparatus is configured to include various member devices such as a work attachment (not shown) having a bucket provided at the tip.
The upper swing body 3 is provided with a cab-type driver's seat 6 on the front side on one side (left side), and a storage chamber 7, a fuel tank 8, and a hydraulic oil tank 9 arranged side by side from the front side on the other side (right side). An engine hood 10 with an engine or the like installed in the rear is disposed, and a counterweight 11 is provided at the rear end.

  The fuel tank 8 is provided with a fuel inlet 12 on the upper surface thereof, and a cylindrical base 13 is provided integrally with the fuel inlet 12 so as to protrude upward from the tank upper surface. . An inner flange portion 13a is formed at the upper end edge of the base 13 so as to be folded back toward the inner periphery, and a notch 13b is formed at a predetermined interval on the inner periphery of the inner flange portion 13a.

  On the other hand, 14 is an oil pump, and the outer periphery of the oil pump 14 is formed in a columnar shape, and is divided into upper and lower parts 14b and 14c with a flange 14a formed on the upper outer periphery as a boundary. In the embodiment, the upper side portion 14b has a large diameter, and the lower side portion 14c has a small diameter. On the lower side portion 14c, a support plate 14d is formed in a hook shape at an upper position close to the flange portion 14a. On the outer periphery of the support plate 14d, a locking piece 14e corresponding to the notch 13b is formed to protrude. Has been. Reference numeral 15 denotes an O-ring provided between the flange 14a and the locking piece 14e. Then, the oil pump 14 inserts the lower part 14c into the base 13, pushes the collar part 14a downward from the inner collar part 13a with the locking piece 14e aligned with the notch 13b, and rotates the oil pump 14 around the circumference. It can be detachably attached to the base 13 by turning it.

  A fuel discharge port 14f is formed in a cylindrical shape on the lower surface of the lower side portion 14c of the fuel pump 14 so as to project downward, and a strainer 16 is detachably attached to the discharge port 14f. In the embodiment, it is detachable by screwing. Further, a liquid (fuel) detection sensor 17 is provided on the peripheral surface of the lower portion 14c to detect that the fuel level is full when the fuel pump 14 is attached to the base 13. .

  On the other hand, on the upper surface of the oil pump upper portion 14b, a male coupler 18 serving as a pump oil filler, and an insertion port 14g into which a power plug 19a provided on a power cord 19 for supplying power to the oil pump 14 is inserted. A switch 20 for switching ON / OFF of the oil supply pump 14 is provided. Then, with the female coupler 22 connected to the base end portion of the oil supply hose 21 being detachably connected to the coupler 18, the distal end portion of the oil supply hose 21 is inserted into the drum can 23 and the plug 19 a of the power cord 19 is inserted. When the switch 20 is turned on with the plug 19b connected to the other end of the power cord 19 inserted into the power outlet 24 for the cigarette lighter provided in the driver's cockpit 6, for example. The oil supply pump 14 is driven, and the fuel in the drum can 23 is supplied to the fuel tank 8. Then, when the fuel supplied is detected by the liquid detection sensor 17, the power supply circuit is opened, and the fuel supply pump 14 is automatically stopped. Incidentally, the refueling hose 21 removed from the coupler 18 can be stored in a rolled state in a storage chamber 7 formed on the front side of the fuel tank 8. The cap 25 is a member for covering the pump upper portion 14b, and is screwed in the present embodiment.

  In the embodiment of the present invention configured as described above, when fuel is supplied when there is no fuel supply vehicle or the like, the coupler 22 of the fuel supply hose 21 is detachably connected to the fuel supply pump side coupler 18. The tip of the refueling hose 21 is inserted into the drum can 23, while the switch 20 is turned on with one plug 19a of the power cord 19 inserted into the insertion port 14g and the other plug 19b inserted into the power supply outlet 24. The fuel supply pump 14 is driven by this, and the fuel in the drum can 23 is supplied to the fuel tank 8. When the fuel supplied is detected by the liquid detection sensor 17, the power supply circuit is opened, and the fuel supply pump 14 is automatically stopped.

  As described above, in the embodiment in which the present invention is implemented, the oil supply pump 14 for supplying oil is attached to the oil supply port 12 of the fuel tank 8 and serves as a cap for the oil supply port 12. At this time, it is not necessary to house the fuel pump 14 in the storage chamber 7 to improve workability, and a hose for communicating the fuel pump 14 and the fuel tank 8 is not required. 7, the oil supply hose 21 for communicating the oil supply pump 14 and the drum can 23 may be removed from the oil supply pump 14 and stored, and a space required for storage is reduced.

  In addition, since not only the fuel hose 21 but also the power cord 19 can be removed from the fuel pump 14, the upper portion 14 b of the fuel pump 14 protruding from the base 13 can be detachably attached to the cap 25 when not fueled. If covered, the coupler 18, the insertion port 14 g, and the switch 20 provided on the upper portion 14 b are not exposed and can be protected.

  Incidentally, when there is a fuel refueling vehicle, it is sufficient to remove the fuel pump 14 from the base 13, open the refueling port 12, and insert the refueling nozzle into the refueling port 12 for refueling.

  The present invention is not limited to the above-described embodiment, and when the power cord 19 can be accommodated in the cap 25, the power cord 19 does not need to be removed from the insertion port 14g when not refueled. It will be good to stay. Further, the mounting of the fuel pump to the fuel filler port is not limited to the above-described embodiment. For example, as in the second embodiment shown in FIG. In addition to forming the flange portion 27, a screw hole 28a may be formed on the oil supply port 28 side and tightened using a bolt 29 penetrating the through hole 27a. Such attachment is free. .

It is a principal part perspective view of a hydraulic excavator. It is explanatory drawing for refueling. FIG. 2A is a plan view and FIG. 2B is a cross-sectional view showing a base. FIG. 2 shows a fuel pump, wherein (A) is a side view and (B) is an exploded view. It is an exploded perspective view of an oil supply pump. It is an electric circuit diagram of an oil supply pump. It is a perspective view of the oil supply pump which shows 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 8 Fuel tank 12 Refueling port 13 Base 14 Refueling pump 14f Discharge port 14g Insertion port 18 Coupler 19 Power cord 20 Switch 21 Refueling hose 22 Coupler 23 Drum can 25 Cap

Claims (6)

  In a fuel supply apparatus for a construction machine having a fuel pump for supplying fuel to a fuel tank provided in a traveling machine body, the fuel pump is detachably attached to a fuel supply port provided in the fuel tank. A fueling device for construction machinery.   2. The construction machine according to claim 1, wherein a refueling hose for detachably connecting the refueling pump and a storage tank storing fuel for refueling is attached to the refueling pump. Refueling device in   3. The fuel supply apparatus for a construction machine according to claim 1, wherein the fuel supply pump is provided with a detection sensor for detecting that the fuel supplied to the fuel tank is full.   4. The fuel supply apparatus for a construction machine according to claim 3, wherein the fuel supply pump is configured to stop fuel supply based on detection of a full tank of the detection sensor.   5. The fuel oil supply apparatus for a construction machine according to claim 1, wherein a strainer is provided at a fuel discharge port of the oil supply pump.   6. The fuel oil supply apparatus for a construction machine according to claim 1, wherein the power cord provided in the oil supply pump is detachably connected to the oil supply pump.

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