JP2967506B2 - Fuel supply system structure of construction equipment with good supply work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved structure of a fuel supply system of a construction machine represented by a hydraulic shovel or the like.

[0002]

2. Description of the Related Art A construction machine generally includes a lower traveling body serving as a traveling section, and a vehicle body located above the traveling body and having a cab and a working section. FIG. 2 is a schematic diagram showing the entire structure of a hydraulic excavator that is a typical example of such a construction machine. In the drawing, reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving superstructure serving as a vehicle main body, 3 denotes a front structure body serving as a working unit, and 4 denotes a cab.

In such a construction machine, a fuel tank 6 of a driving engine (a hydraulic pump engine 5 in the figure) is installed on the opposite side of the cab 4 as shown in the figure. One reason is that the drive engine is located behind the vehicle body (the upper revolving structure 2 in the figure) and needs to be arranged in a position that does not interfere with it. When supplying fuel from the fuel carrier, it is necessary for an operator to step on step 8 provided on the vehicle body, put on the vehicle body, and connect a hose to the supply port 7,
This is because the side without the cab 4 can be provided with a step, a handrail, or a step 8 as shown in the figure, for example, so that it can be easily mounted on the vehicle body.

When supplying fuel to a construction machine having the structure shown in FIG. 2, the fuel carrier is naturally moved to the fuel tank side (the right side as viewed from the front in the figure), from which the operator moves the vehicle body. And a supply hose is connected to a supply port protruding upward from the fuel tank to perform a fuel supply operation.

[0005]

In a construction machine as shown in FIG. 2, there is a noise problem due to the presence of a drive engine (hydraulic pump engine 5 in the figure) behind the cab 4. For the purpose, as shown in FIG. 3B, a structure in which a drive engine (a hydraulic pump engine 5 in the figure) is arranged on the side opposite to the cab 4 is preferable.

In the case of such a structure, there is no space for disposing the fuel tank 6 on the side opposite to the cab 4, and the fuel tank 6 is disposed behind the cab 4, as shown in FIG. .

However, when fuel is supplied to the construction machine having this structure, the cab 4 is provided on the fuel tank side 6 so that there is no step or handrail or step 8, and the vehicle body (the upper revolving body in the figure) is provided from that side. 2), the fuel carrier was moved not to the fuel tank side but to the side opposite to the cab 4 (the right side as viewed in the front). Then, in the subsequent work, first, the worker leans himself and puts the fuel hose on the vehicle body, then steps 8 and puts on the vehicle body from the stepped portion, and then moves to the side where the fuel tank 6 is located. In the case of the structure shown in FIG. 2, the user walks on the upper surface of the vehicle body, connects the supply hose to the supply port 7 protruding above the fuel tank 6, performs the fuel supply operation, and returns to the opposite side after the operation is completed. It was a very laborious task compared to. Moreover, the ends of various members may protrude from the upper part of the vehicle main body, and the worker needs to be careful when walking to avoid these obstacles, and the work load is large.

In either of the structure shown in FIG. 2 or the structure shown in FIG. 3, the fuel tank 6 is mounted on the frame 20 of the vehicle body as shown in FIG.
(In general, the outer wall of the fuel tank 6 is integral with the vehicle body cover 21), and a supply pipe 9 having a supply port 7 at the tip rises from the lower side surface of the fuel tank 6. 7 protrudes from the upper surface of the vehicle body.

Therefore, when the worker walks on the upper surface of the vehicle main body (especially when returning after finishing the work), there is a problem that the supply port 7 has to be paid attention. In addition, there is a similar problem when walking during work such as periodic inspection, and the rear view from the cab 4 is also deteriorated, which is also aesthetically problematic.

[0010] The present invention has been made in view of the above-mentioned problems of the prior art, and is particularly intended for a construction machine in which a fuel tank is arranged behind a cab, which is used for implementing low noise, when performing a fuel supply operation. It is an object of the present invention to provide a fuel supply system structure of a construction machine which can reduce a required work load and can provide other useful effects and has a good supply operation.

[0011]

According to the present invention, a fuel supply system structure for a construction machine according to the present invention is a construction machine in which a fuel tank is disposed behind a cab. A basic feature is that a supply flow path provided with a port is extended, and the supply port is arranged on the opposite side of the cab.

In this configuration, the upper surface of the fuel tank is lowered below the upper surface of the vehicle body (for example, the outer wall of the fuel tank is no longer used as the vehicle body cover, and the fuel tank is housed inside the vehicle body cover). If the supply port is arranged at an arbitrary position between the upper surface of the fuel tank and the upper surface of the vehicle body, the supply port does not protrude from the vehicle body. Further, the supply flow path may extend from an upper side surface of the fuel tank.

[0013]

According to the present invention, the fuel tank is arranged behind the cab, but the fuel supply port is arranged on the opposite side of the cab. Therefore, when supplying fuel from the fuel carrier, the fuel carrier is moved to the opposite side of the cab, and the worker rides on the vehicle body using the step, and supplies the fuel at a position where it hardly moves from the place where it was placed. Just connect the hose to the supply.

Further, if the upper surface of the fuel tank is lowered below the upper surface of the vehicle body, and the supply port is arranged between the upper surface of the fuel tank and the upper surface of the vehicle body,
Since the fuel supply port does not protrude from the upper surface of the vehicle body, it is not necessary to walk while paying attention to the supply port during a work such as a periodic inspection as in the related art, and the rear view from the cab is improved, and the appearance is improved. Further, if the supply flow path extends from the upper side surface of the fuel tank, the air in the fuel tank can be released through the supply flow path (conventionally, as shown in FIG. The supply pipe 9 protrudes from the lower side surface of the tank 6 and the air vent 60 is provided on the upper surface of the tank 6), so that there is no need to provide another air vent structure in the fuel tank.

In the present invention, since the fuel tank is not arranged on the side opposite to the cab, it is natural that the driving engine can be arranged there. With such a configuration, low noise can be achieved. In other words, in the case of a structure in which the drive engine is arranged on the opposite side of the cab for the purpose of low noise, and the fuel tank is arranged on the cab side accordingly, the above-described operation is performed, so the configuration of the present invention is particularly significant. .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an example in which the structure according to the present invention is used in a hydraulic shovel, (a) is a side view of a vehicle body of the hydraulic shovel, and (b) is a plan view of (a). In the figure, 2 is an upper revolving superstructure, 3 is a front structure, 4 is a cab, 5 is a hydraulic pump engine, and 6 is a fuel tank.

In this embodiment, a hydraulic pump engine 5 is arranged behind the upper swing body 2 and on the opposite side of the cab 4 so as to achieve a low noise. Therefore, the fuel tank 6 is arranged behind the cab 4.

The fuel tank 6 is a bottom frame of the upper swing body 2.
The upper revolving unit cover 21 is placed on the upper revolving body cover 21 and is placed in the cover 21 with a gap up to the upper surface of the cover 21 in the mounted state. ing. In addition, in the gap to the upper surface of the cover 21,
Although not particularly shown, various control devices (controllers) are arranged.

A supply pipe 9 serving as a fuel supply flow path is connected to an upper side surface of the fuel tank 6, and the supply pipe 9 is connected to the upper revolving unit 2.
It straddles the center and extends to the opposite side of the cab 4. A supply port 7 is provided at an end of the supply port 7, and a tip of the supply port 7 projects upward in accordance with the upper surface of the cover 21.

Since the present embodiment is constructed as described above, the fuel is supplied by moving the fuel carrier to the opposite side of the cab 4, and the worker leans on the step from step 8 to get the supply hose. It only needs to be connected to the supply port 7. That is, the hydraulic pump engine 5 is connected to the cab 4 for low noise.
In the structure of the present embodiment in which the fuel tank 6 is disposed on the opposite side and the cab 4 is disposed behind the cab 4, the upper surface of the upper revolving unit 2 does not have to walk one by one while taking care of protrusions and the like as in the related art. Therefore, the burden on the worker is greatly reduced.

Further, since the supply port 7 does not protrude from the upper surface of the upper revolving unit 2, it is no longer necessary to walk while worrying about the supply port 7 during a work such as a periodic inspection.
Also, the rear view from the cab 4 is improved, and the appearance is improved. Further, since the supply pipe 9 extends from the upper side surface of the fuel tank 6, air in the fuel tank 6 can be released through the supply pipe 9,
It is not necessary to provide the structure of the air vent 60 as shown in FIG. 4 in the fuel tank 6, so that the structure of the tank 6 is simplified and the cost is reduced.

Although this embodiment shows an example in which the structure of the present invention is applied to a hydraulic excavator, it is needless to say that the present invention is not limited to this embodiment and can be applied to various construction machines.

[0024]

As described above, according to the fuel supply system structure of the construction machine according to the present invention, when supplying fuel, the fuel carrier is moved to the opposite side of the cab, and the worker utilizes the steps to take advantage of the step. Simply connect the supply hose to the supply port. In other words, even in a structure in which the drive engine is arranged on the opposite side of the cab for the purpose of low noise, and the fuel tank is arranged behind the cab, the upper surface of the vehicle body may be individually positioned while paying attention to protrusions and the like, as in the related art. It is not necessary to walk, and the burden on the worker is greatly reduced, and the fuel supply work efficiency is remarkably improved.

[Brief description of the drawings]

FIG. 1 shows an example in which a structure according to the present invention is used in a hydraulic shovel, (a) is a side view of a vehicle body of the hydraulic shovel, and (b) is a plan view of (a).

2A and 2B show an example of a conventional construction machine, wherein FIG. 2A is an overall perspective view of a hydraulic shovel, and FIG. 2B is a plan view of FIG.

3A and 3B show another example of a conventional construction machine, wherein FIG. 3A is an overall perspective view of a hydraulic shovel, and FIG. 3B is a plan view of FIG.

FIG. 4 is a side sectional view showing a structure of a fuel tank of a conventional construction machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 3 Front structure 4 Cab 5 Hydraulic pump engine 6 Fuel tank 7 Supply port 8 Step 9 Supply pipe

Claims (3)

(57) [Claims] In a construction machine having a fuel tank disposed behind a cab, a supply passage connected to the fuel tank and having a supply port at an end is extended, and the supply port is provided on a side opposite to the cab. A fuel supply system structure of a construction machine having a good supply operation characterized by being arranged. 2. The fuel supply system structure of a construction machine according to claim 1, wherein an upper surface of said fuel tank is lowered below an upper surface of a vehicle body, and an upper surface of said fuel tank is connected to an upper surface of said vehicle body. 2. The fuel supply system structure of a construction machine according to claim 1, wherein the supply port is disposed at an arbitrary position between the supply ports. 3. The fuel supply system for a construction machine according to claim 2, wherein a supply passage extends from an upper side surface of said fuel tank. Good construction equipment fuel supply system structure.