JPH10317427A - Working travel body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save energy by arranging at least one of motor, pump, control valve, hydraulic oil tank, fuel tank, and slewing drive device in the lower travelling body when these devices are provided in the working travel body rotatably supporting the upper slewing body on the lower travelling body. SOLUTION: A hydraulic shovel 1 is constituted of the lower travelling body 2, the upper slewing body 4 rotatably supported by the lower travelling body 2 through a slewing bearing 3, a working device 5, etc. And respective devices such as engine 12, hydraulic pump 13, control valve 14, slewing drive device 15, hydraulic oil tank 16, fuel tank 17, etc., which are arranged on the upper slewing body 4 in conventional cases, are arranged on the lower travelling body 2. Accordingly, the weight of the upper slewing body is reduced and hence the slewing torque is decreased and energy is greatly spared.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a working traveling machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art In general, there is a working traveling machine, such as a hydraulic shovel, which is constructed by swingably supporting an upper rotating body above a lower traveling body. Conventionally, the upper revolving unit of the traveling body is provided with a prime mover such as an engine, and various members, devices and devices such as a hydraulic pump, a control valve, a swing driving device, a hydraulic oil tank, a fuel tank, a counterweight, and a cab. At the same time, a working device such as a digging device is attached.

[0003]

The turning torque of the upper revolving unit increases and decreases in accordance with the weight of the upper revolving unit. However, the weight of the conventional upper revolving unit depends on various members, as described above. Since the equipment and devices are provided, it is heavy, and if the work equipment is loaded with luggage such as earth and sand, that amount will be added to the weight of the upper revolving unit, and the turning torque will be extremely high. It becomes big. For this reason,
The turning of the upper turning body requires a large amount of energy, which hinders energy saving, and there is a problem to be solved by the present invention. Further, among the members, devices, and devices provided in the upper swing body,
Engines and hydraulic pumps and their peripherals (for example,
There are many things that require maintenance, such as engine oil filters, water separators, etc., and filters for hydraulic oil tanks. When performing these maintenances or replenishing fuel to the fuel tank, the work vehicle Is large and the upper swing body is located at a higher position, it is necessary for the operator to work on the upper surface of the upper swing body. However, it is troublesome to go up and down on the upper surface of the upper swing body every time maintenance work or fuel supply work is performed, and there is a problem to be solved that workability is poor.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made for the purpose of solving these problems. The working traveling machine consists of a motor, pump, control valve, hydraulic oil tank, fuel tank,
In providing the turning drive, at least one of them is disposed on the lower traveling body. By doing so, the weight of the upper swing body is reduced, the swing torque is reduced, and it is possible to greatly contribute to energy saving. Further, since the weight of the upper revolving structure becomes lighter and the weight of the lower traveling structure becomes heavier, it is possible to reduce the center of gravity of the entire body and achieve good stability. In addition, when performing maintenance work, fuel supply work, and the like, the work can be easily performed from the ground surface. In this case, when the counterweight is provided on the upper revolving structure, all or a part of the counterweight is disposed below the gantry frame of the upper revolving structure, thereby lowering the floor and lowering the center of gravity of the working vehicle. Can be measured.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. First, in the first embodiment shown in FIG. 1, reference numeral 1 denotes a hydraulic excavator, and the hydraulic excavator 1 is pivotally supported by the lower traveling body 2 and the lower traveling body 2 via a pivot bearing 3. The upper revolving unit 4 includes a working unit 5 attached to a front portion of the upper revolving unit 4.

The base frame of the undercarriage 2 is formed by integrally fixing a car body 7 and a pair of left and right track frames 8 to each other.
Idler 9, drive sprocket 10, these idlers 9
A traveling device such as a crawler belt 11 suspended between the driving sprocket 10 is provided.

The car body 7 has a cylindrical shape in which an outer race 3b of the slewing bearing 3 is attached to an upper end portion. A space inside the cylinder of the car body 7 is vertically divided. In the upper space 7a, power units and power transmission devices such as the engine 12, the hydraulic pump 13, the control valve 14, the turning drive device 15, and the like are stored. In the lower space 7b, a hydraulic oil tank 16, a fuel The tank 17 and the like are stored. Further, these spaces 7a and 7b
The cover members 7c and 7d can be opened and closed by opening and closing the cover members 7c and 7d so that maintenance work and fuel supply work of the power unit and the power transmission device can be performed.

[0008] On the other hand, reference numeral 18 denotes a frame of the upper revolving unit 4.
The inner race 3a of the slewing bearing 3 is attached. Furthermore, on the front part of the gantry frame 18,
A bracket 19 for attaching a working device is fixedly protruding below the gantry frame 18, and the bracket 19 for attaching the working device is attached to the base end of a boom 20 and a boom 20 constituting the working device 5. The base end of the hydraulic cylinder 21 is swingably supported. Further, a cab 22 is provided at the front of the gantry frame 18 to the left of the working device mounting bracket 19. The cab 22 has a lower half protruding below the gantry frame 18. Installed. Also, the gantry frame 18
A counterweight 23 for balancing the load with the working device 5 and the cab 22 is attached to the rear lower surface so as to protrude below the gantry frame 18. Reference numeral 24 denotes a rotary joint provided at the center of rotation of the upper revolving unit 4, a hydraulic device such as a control valve 14 provided on the lower traveling unit 2 via the rotary joint 24, and an upper revolving unit. The configuration is such that hydraulic oil is sent and received between hydraulic equipment such as a boom hydraulic cylinder 21 provided on the fourth side.

In the vehicle constructed as described above, the lower traveling body 2 includes, in addition to traveling devices such as an idler 9, a driving sprocket 10, and a crawler belt 11, an engine 1
2. Various components such as a hydraulic pump 13, a control valve 14, a swing driving device 15, a hydraulic oil tank 16, a fuel tank 17, and the like, which are conventionally provided on the upper revolving unit, are provided. The upper revolving unit 4 is provided with only member devices that are indispensable for the upper revolving unit 4, such as the working device 5, the cab 22, and the counterweight 23.

As a result, the weight of the upper swing body 4 can be reduced as much as possible, and the swing torque can be reduced, which can greatly contribute to energy saving. Further, the working device 5
Even when heavy luggage such as earth and sand is loaded in the vehicle, the turning speed can be increased and the working efficiency can be improved because the turning torque is small.

In addition, as described above, the weight of the upper revolving unit 4 is reduced, while the weight of the lower traveling unit 2 is increased by the amount of the various components such as the engine 12 provided. The center of gravity can be reduced, and the stability can be improved. Further, since the stability of the entire body is good, the counterweight 23 for balancing the load with the working device 5 and the cab 22 is used.
And the weight of the upper swing body 4 can be further reduced.

In addition, the engine 12 and the hydraulic pump 1
3 and its peripheral devices (not shown, for example, an engine oil filter, a water separator, etc.), a maintenance work of a filter (not shown) of the hydraulic oil tank 16, etc., or replenish the fuel tank 17 with fuel. In such a case, since these member devices are disposed on the lower traveling unit 2, it is possible to easily perform the work from the ground surface, and it is necessary to ascend to the upper surface of the upper revolving unit each time as in the related art. And workability is improved.

Further, in this vehicle, various member devices such as the engine 11 are disposed on the lower traveling body 2 by effectively utilizing the internal space of the car body 7. A space is required, and in this embodiment, the car body 7 has a high vertical height to secure the space. For this reason, the gantry frame 18 of the upper swing body 4 is located at a high position, and there is a possibility that the entire body becomes tall or the center of gravity of the upper swing body 4 becomes high. In the embodiment, the working device mounting bracket 19 and the counterweight 23 are mounted so as to protrude below the gantry frame 18, and the cab 22 is also mounted so that the lower half portion protrudes below the gantry frame 18. As a result, the floor of the entire aircraft is lowered and the center of gravity is lowered. Further, the upper side of the gantry frame 18 of the upper revolving unit 4 is almost an empty space because only a few members such as the rotary joint 24 and the oil pipe 25 are arranged.
By loading luggage and the like here, the hydraulic excavator 1 can be used as a transport trolley.

It should be noted that the present invention is not limited to the first embodiment, and the car body 7 can be moved in the left-right direction and / or the front-rear direction as in the second embodiment shown in FIG. If it can be widened, the engine 12, the hydraulic pump 13, the control valve 14, the hydraulic oil tank 1
6. Various member devices such as the fuel tank 17 can be stored in a single step, and in such a case, the center of gravity can be further reduced. The shape of the car body may be any suitable shape such as a square tube shape (box shape), an oval shape, etc., in addition to the cylindrical shape. Further, when a sufficient space cannot be secured in the lower traveling body 2, for example, as in the third embodiment shown in FIG. 3, the engine 12, the hydraulic pump 13, the control valve 14, the turning drive device 15, the hydraulic oil tank 15,
And only a part of the fuel tank 16 is
The present invention can be implemented even if it is configured to be disposed in the first position. Also,
In the third embodiment, the counter weight 2
3 is provided above and below the gantry frame 18 and
Although the entire cab 22 is provided on the upper side of the gantry frame 18, this may be adopted. Further, as in the fourth embodiment shown in FIG. 4, the working device 5 may be attached to the upper side of the gantry frame 18 as a matter of course. In the second to fourth embodiments, components common to the first embodiment (the same components) are denoted by the same reference numerals and drawn.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a hydraulic excavator according to a first embodiment.

FIG. 2 is a partial cross-sectional side view of a hydraulic excavator according to a second embodiment.

FIG. 3 is a partial cross-sectional side view of a hydraulic shovel showing a third embodiment.

FIG. 4 is a partial cross-sectional side view of a hydraulic excavator according to a fourth embodiment.

[Explanation of symbols]

 2 Lower traveling body 4 Upper revolving superstructure 12 Engine 13 Hydraulic pump 14 Control valve 15 Revolving drive 16 Hydraulic oil tank 17 Fuel tank 18 Mounting frame 23 Counter weight

Claims (2)

[Claims] When a motor for driving, a pump, a control valve, a hydraulic oil tank, a fuel tank, and a turning drive device are provided in a working traveling body in which an upper revolving body is pivotably supported on a lower traveling body, A working traveling body, wherein at least one of the two is disposed on the lower traveling body. 2. The work vehicle according to claim 1, wherein all or a portion of the counterweight is disposed below the gantry frame of the upper revolving unit when the counterweight is provided on the upper revolving unit.