JP2001303616A - Fuel-hydraulic oil tank for construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel-hydraulic oil tank, by which large practical effect is obtained even in space saving and in which the temperature rise of fuel is not also generated. SOLUTION: The construction machinery such as a hydraulic backhoe is manufactured in constitution in which a fuel tank and a hydraulic oil tank are unified integrally, the fuel tank is arranged on the lower side and the hydraulic oil tank is disposed on the fuel tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of fuel tanks and hydraulic oil tanks for construction machinery.

[0002]

2. Description of the Related Art An engine is used as a power source.
In order to operate a work machine using hydraulic equipment, a fuel tank for storing liquid fuel and a hydraulic oil tank are conventionally mounted on construction machines. Conventional hydraulic oil tanks and fuel tanks are configured as separate components, and are separately arranged. For example, Japanese Patent Laid-Open Publication No. Hei 11-324014
The fuel tank is located on the left side behind the cab and the hydraulic oil tank is located on the right side near the hydraulic pump as disclosed in US Pat.

In some construction machines such as hydraulic shovels, particularly small hydraulic shovels, the storage space above the upper revolving unit is narrow, and therefore, the fuel tank and the hydraulic oil tank may be arranged in parallel. For example, Japanese Patent Publication No.
The fuel tank and the hydraulic oil tank disclosed in 183684 are disposed adjacent to each other.

[0004] As shown in FIG. 4, a fuel tank 41 and a hydraulic oil tank 42 are arranged in parallel, and a gap is provided between them.
In addition to the installation space of 2, a space for clearance is required,
Not only space saving cannot be achieved, but also a separate fixing device is required on the floor of the upper revolving unit, and the fixing device is complicated.

In order to simplify the fixing device, as shown in FIG. 5, when the fuel tank 44 and the hydraulic oil tank 45 are integrally formed, the heat of the hydraulic oil tank 45 is
4, the temperature of the liquid fuel in the fuel tank rises, and the construction machinery using the diesel engine has a problem that the output horsepower of the engine decreases. In addition, since the installation area cannot be reduced so much, there remains a problem that a large effect cannot be obtained in space saving.

[0006]

SUMMARY OF THE INVENTION The present invention has been made under the above-mentioned background, and provides a fuel-hydraulic oil tank which is effective in saving space and does not cause an increase in fuel temperature. The task is to provide.

[0007]

The present invention employs the following means to solve the above-mentioned problems. That is, claim 1
The described invention is characterized in that in a construction machine such as a hydraulic shovel, a fuel tank and a hydraulic oil tank are vertically integrated.

According to a second aspect of the present invention, in the first aspect of the present invention, the fuel tank is disposed on a lower side, and a hydraulic oil tank is disposed on an upper side thereof.

According to a third aspect of the present invention, in the first aspect of the present invention, the fuel tank and the hydraulic oil tank are integrally formed.

[0010]

1 to 3 show an embodiment of the present invention. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a fuel tank formed integrally with a fuel tank 11 disposed on a lower side and a hydraulic oil tank 12 disposed on an upper side.
3 shows a hydraulic oil tank. A fuel supply port 13 of the fuel tank 11 is provided on a side wall of the fuel tank 11, and a fuel supply port 14 of the hydraulic oil tank 12 is provided on an upper surface of the tank 10 (the hydraulic oil tank 12). Caps 15 and 16 are removably attached to the fuel ports 13 and 14, respectively.

In the embodiment shown in FIG. 1, since the fuel supply port 13 of the fuel tank 11 is provided on the side wall, an air layer 17 is formed inside the fuel tank 11 even when the liquid fuel is full, and this air layer is insulated. Acting as a material, heat is not transmitted from the hydraulic oil tank 12 to the fuel in the fuel tank 11. As a result, the fuel temperature rises and the engine horsepower does not decrease. Further, since the fuel tank 11 and the hydraulic oil tank 12 are configured to be vertically stacked, an effect of saving space can be obtained. Further, since the fuel tank 11 and the hydraulic oil tank 12 are integrally formed, only one fixing device (not shown) for fixing to the floor surface or the like of the upper revolving structure is required, so that the fixing device is fixed as compared with the conventional device. The effect of being simpler is also obtained.

FIG. 2 shows a tank 10 of another embodiment.
The same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted. In FIG. 2, a fuel supply pipe 20 is provided in a fuel tank 11 so that a fuel supply port 15 can be moved to an appropriate position convenient for fueling. Therefore, in addition to the effect of the embodiment shown in FIG. 1, an effect that the refueling work of the fuel is further facilitated is obtained.

FIG. 3 shows a tank 10 according to still another embodiment. 1 and 2 are denoted by the same reference numerals, and detailed description is omitted. In FIG. 3, a gap 23 is provided between the fuel tank 11 and the hydraulic oil tank 12 so that air flows. As a result, heat transfer from the hydraulic oil tank 12 to the fuel tank 11 is completely prevented, and cooling of the hydraulic oil is improved. That is, since the conventional hydraulic oil tank is installed in a similar manner to the floor of the upper revolving structure, cooling from the bottom of the hydraulic oil tank could hardly be expected. In this embodiment, the bottom surface of the hydraulic oil tank is separated from the floor, and a gap is provided below the bottom surface of the tank to allow air to flow, so that a better cooling effect can be obtained.

The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the examples, and changes in design and the like may be made without departing from the gist of the present invention. Even if there is, it is included in the present invention. For example, the case where the fuel tank and the hydraulic oil tank are separately formed and both are vertically stacked and fixed also belongs to the technical scope of the present invention.

[0015]

As described above, according to the structure of the present invention, since the fuel tank and the hydraulic oil tank are vertically arranged and integrated, the space can be saved and the fixing device can be simply constructed. The effect is obtained. Further, when the hydraulic oil tank is stacked on the fuel tank, an air layer is formed on the fuel tank, so that an effect of preventing heat conduction from the hydraulic oil tank to the fuel tank can be obtained.

[Brief description of the drawings]

FIG. 1 shows a configuration diagram of an embodiment of the present invention.

FIG. 2 shows a configuration diagram of another embodiment of the present invention.

FIG. 3 shows a configuration diagram of still another embodiment of the present invention.

FIG. 4 shows an example of a conventional tank arrangement.

FIG. 5 shows an example in which a fuel tank and a hydraulic oil tank are arranged side by side and integrated.

[Explanation of symbols]

 Reference Signs List 11 fuel tank 12 hydraulic oil tank 15, 16 cap 17 air layer 20 oil supply pipe 23 gap

Claims (3)

[Claims] 1. A fuel-hydraulic oil tank for a construction machine, such as a hydraulic shovel, wherein a fuel tank and a hydraulic oil tank are vertically integrated. 2. The fuel tank according to claim 1, wherein the fuel tank is disposed on a lower side, and a hydraulic oil tank is disposed on the upper side.
A fuel-hydraulic oil tank for a construction machine as described in the above. 3. The fuel-hydraulic oil tank for a construction machine according to claim 1, wherein the fuel tank and the hydraulic oil tank are formed integrally.