JPH0960039A - Frame structure of excavation work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a body frame, improve cooling efficiency and reduce noise level at a stroke. SOLUTION: In an excavation work machine wherein a fuel tank 36 and/or oil tank 37 and radiator 32 with a radiator fan are arranged on a body frame 20, the fuel tank 36 and/or oil tank 37 are supported on the support plate 38 which is erectedly provided on the body frame 20. An air guide plate 60 extending in nearly the axial direction is provided in the support plate 32 in integral relation to guide the flow of the air caused by the radiator fan 31. A noise absorbing material 61 is supported on the air guide plate 60 to absorb the noise caused by the radiator 32.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a frame structure of an excavating work machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art Generally, this type of excavating work machine has a fuel tank and an oil tank arranged on a machine body frame, and these tanks are fixedly mounted on the machine body frame. Further, a radiator device provided with a radiator fan is arranged at the rear of the machine body frame.

[0003]

By the way, in order to improve workability in the town, it is necessary to downsize the machine body frame. For that purpose, it is necessary to reduce the number of constituent members and optimize the member arrangement. On the other hand, in order to work continuously for a long time, it is necessary to improve the cooling efficiency of the radiator.

Furthermore, there is a demand to reduce noise particularly in the town. Therefore, an object of the present invention is to provide a frame structure of an excavating work machine that can achieve downsizing of a machine body frame, improvement of cooling efficiency, and noise reduction all at once.

[0005]

In order to solve the above problems, the present invention has taken the following technical means. That is, in the invention according to claim 1, in the excavating work machine in which the fuel tank and / or the oil tank and the radiator device including the radiator fan are arranged on the machine body frame, the support plate erected on the machine body frame is provided. The fuel tank and / or the oil tank is supported by the support plate, and the support plate is integrally provided with a wind guide plate that extends substantially in the axial direction of the radiator fan and guides the flow of wind by the radiator fan. In addition to providing stable support, the support plate itself is also stably supported by the tank, and since the wind guide plate is integrally provided on this support plate, the wind guide plate is also stably supported, and the wind guide plate is Generation of noise due to vibration is suppressed, cooling of the radiator fan is achieved while reducing the number of components, simplifying and stabilizing the mounting structure, and saving space. To improve the rate.

In the invention according to claim 2, the sound absorbing material for absorbing the noise generated in the radiator device is supported by the wind guide plate, so that the wind guide plate also serves as a mounting bracket for the sound absorbing material, thereby simplifying the structure. In addition to reducing the number of constituent members, the installation space is rationalized, and the above-described cooling efficiency and noise are reduced while achieving miniaturization.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show an excavation work machine 1 according to an embodiment of the present invention, which is also called a hydraulic excavator or a backhoe. This excavator 1
Has a crawler-type traveling machine body 2 in the lower part thereof, and a revolving machine body 3 having a substantially circular shape in a plan view is mounted on the upper part of the traveling machine body 2 so as to be fully revolvable around the longitudinal axis. The turning radius of the turning body 3 is smaller than the width of the left and right crawlers 4,
Improves workability in narrow spaces such as in towns. A dozer device 5 is attached to the front of the traveling machine body 2.

A backhoe device 6 for excavating work is mounted on the front part of the swivel body 3, and a counterweight 7 for optimizing the weight balance between the front and rear is mounted on the rear part. Further, a driver's seat 8 is mounted on the swivel body 3, and a step 9 for placing a foot is provided on the lower front portion of the driver's seat 8. An operation lever 10 and an operation pedal 11 are provided on the step 9 in front of the driver's seat 8, and an operation panel 12 is provided on the right side of the driver's seat 8. An entrance / exit 13 is provided on the left side of the driver's seat 8, and an auxiliary entrance / exit 14 is provided on the right front side of the driver's seat 8 and on the right side of the backhoe device 6 as well. Has improved the ease and convenience.
A canopy 15 is provided above a driver unit including the driver's seat 8 and the like.

The turning machine body 3 is constructed by mounting a machine body cover 21 made of synthetic resin or metal, a bonnet 22 and the like on the machine body frame 20. Hereinafter, the frame structure according to this embodiment will be described in detail. The machine body frame 20 includes a base plate 23 that is substantially circular in a plan view. The base plate 23 is rotatably supported by the traveling machine body 2 and is rotatably driven by a slewing hydraulic motor 24 provided on the base plate 23. As shown in FIG. 1, a pair of left and right reinforcing members 25 are provided on the base plate 23 so as to have a substantially V-shape in a plan view. The backhoe device 6 is provided at the front end of the reinforcing member 25.
Is provided with a mounting bracket 26.

A hydraulic control valve 27 for controlling various hydraulic devices is disposed on the left front part of the base plate 23, and a water-cooled three-cylinder engine 28 is mounted on the rear part of the base plate 23 via an engine mount (not shown). It is placed horizontally. A hydraulic pump 29 is provided on the left side of the engine 28, and a radiator device 32 including a radiator 30 and a radiator fan 31 is provided on the right side. A fan cover (not shown) is provided around the radiator fan 31 to improve the blowing ability of the fan 31.

The bonnet 22 is mounted on the rear side of the machine body cover 21 so as to be opened and closed so that the engine 28, the hydraulic pump 29, the radiator device 32 and the like can be inspected. In addition, the driver's seat 8 has a fuselage cover 2
1 and the hood 22 are mounted and mounted so that the driver's seat 8 is tilted forward when the hood 22 is opened. In addition, driver's seat 8
It is also possible to dispose it in front of the hood 22 without mounting it on the upper part of the hood 2.

The radiator 30 is mounted on a radiator support base 33 provided on the base plate 23. Further, the radiator fan 31 is mounted and held on a mounting shaft 34 protruding rightward from the engine 28,
The hot air that is rotatably driven by the rotational power of the engine 28 and blows air toward the radiator 30 and that has passed through the radiator 30 is discharged to the outside of the machine from the exhaust port 35 provided on the right side wall of the machine body cover 21 and the hood 22. The radiator device 32 is of a so-called discharge type that directly discharges hot air toward the outside of the machine.

A fuel tank 36 and an oil tank 37 are arranged at the front and rear at the right front portion of the machine frame 20 (that is, in front of the radiator device 32). Note that the tanks 36, 37 are provided with an openable / closable bonnet 19 above them. By opening the bonnet 19, the tanks 36, 37 can be refilled with fuel and oil easily and quickly.

These tanks 36 and 37 are mounted and fixed on a support bracket 34 provided on the base plate 23, and at the same time, the body frame 20 (base plate 2).
The side surfaces of the tanks 36 and 37 are attached and fixed to a support plate 38 extending in the front-rear direction and erected in 3), so that both tanks 36 and 37 are stably supported by the support plate 38. Thus, the fuel tank 36 and the oil tank 3
If all of 7 are supported by one support plate 38, compared to the case where a support member is provided for each tank 36, 37,
The number of constituent members can be reduced, the mounting structure can be simplified, and the strength can be further improved by connecting the two tanks 36, 37 to each other. In addition,
The support plate 38 can also support only one of the fuel tank 36 and the oil tank 37.

Specifically, the lower edge of the support plate 38 is bent into a substantially L shape, and this bent portion 39 is welded and fixed to the upper surface of a support base 40 provided on the base plate 23. ing. The support base 40 is provided on the left side of the fuel tank 36 and the oil tank 37 so as to straddle the right reinforcing member 25 in the front-rear direction and across the front end portion of the base plate 23 and the middle portion in the front-rear direction. That is, the support plate 38 is attached and fixed to the base plate 23 via the support base 40 having a required height. The operation panel 12 is attached and fixed to the upper end of the support plate 38, and the support plate 38 is also used as an attachment member for the tanks 36, 37 and the operation panel 12 in this manner, thereby further reducing the number of components. Space saving can be achieved.

On the upper surface of the right end portion of the base plate 23, there is provided a pedestal 45 having a required height which is mainly constituted by a plurality of constituent members 41, 42, 43, 44.
On the upper surface of the plate-shaped member 46, which serves as a pillar of the body cover 21 or the like.
However, they are welded and fixed so that the right outside is inclined rearward. The upper end of the plate-shaped member 46 and the upper end of the support plate 38 are connected by a plate-shaped connecting member 47,
Reinforce each other.

On the other hand, on the upper surface of the left end portion of the base plate 23, a pedestal including a support member 51 having a substantially L shape in side view, a support member 52, and a mounting member 53 supported by these members 51, 52 at a required height. 54 is provided. The rising plate portion 5 extending upward is provided on the right side edge of the mounting member 53.
5 are provided integrally. This rising plate 55
And the supporting plates 38 of the tanks 36 and 37 are connected and integrated by a pipe-shaped connecting frame 56. Therefore, the left and right pedestals 45 and 54, columns 46 (plate-shaped members), and connecting members 47 are formed. The supporting plate 38, the connecting frame 56, and the like constitute an arch-shaped frame for supporting the machine body cover 21 and the bonnet 22 and improving the rigidity of the machine body frame 20.

The right column 16 of the canopy 15 is attached and fixed to the upper surface of the connecting member 47 located at the upper right end, and the left column 17 is erected on the upper surface of the attachment member 53 located at the left side. It is attached and fixed to the upper end of the intermediate column 18. As described above, if the support plate 38 of the fuel tank 36 and the oil tank 37 is configured as a part of the body frame 20, the support plate 38 can be attached more stably, and thus the fuel tank 36 and the oil tank 37. Can be supported more stably, and the rigidity of the machine body frame 20 can be increased by both of these tanks 36 and 37. By reinforcing each other, a structure with high rigidity can be obtained with few constituent members. You can

At the rear side edge of the support plate 38, the radiator fan 31 extends substantially in the axial direction of the radiator fan 31.
The wind guide plate 60 for guiding the flow of the wind is integrally provided. In the present embodiment, the wind guide plate 60 is arranged adjacent to the front of the radiator fan 31 and extends inward in the left-right direction from the rear side edge of the support plate 38. In addition, the wind guide plate 60 directly on the base plate 23,
Alternatively, by indirectly welding and fixing it via a bracket, the attachment strength of the wind guide plate 60 is improved, and the wind guide plate 60 prevents the support plate 38 from tilting in the left-right direction.
The mounting strength of the support plate 38 can also be improved.

The radiator fan 31 of the wind guide plate 60
A sound absorbing material 61 that absorbs noise generated by the radiator device 32 is attached and supported on the side surface (rear surface) on the side. The sound absorbing material 61 has a substantially plate shape, extends to the right outside of the radiator device 32, and is sandwiched and held between the radiator 30 and the oil tank 37. Further, on the right side of the radiator 30, the plate-shaped member 46 is attached and supported. As the sound absorbing material 61, various materials other than those made of foamed resin can be adopted.

Thus, the wind guide plate 60 and the plate member 4
By also using 6 as a mounting member for the sound absorbing material 61, it is possible to reduce the number of constituent members and to further reduce the size of the swivel body 3. Moreover, since the noise is reduced by the sound absorbing material 61, the environmental performance can be improved, and the sound absorbing material 61 allows the radiator fan 31 to be improved.
It is possible to guide the flow of wind from the inside of the machine to the exhaust port 35 and smooth it, and improve the cooling efficiency of the radiator device 32.

The present invention is not limited to the above-mentioned embodiment, and the design can be changed appropriately. For example, fuel tank 3
6 and the oil tank 37 can be arranged on the right side or the rear of the base plate 23.
Can also be arranged on the left and right sides of the base plate 23 in an inclined manner. Further, the radiator fan 31 can be driven by an electric motor provided separately.

[0023]

According to the invention of claim 1, the fuel tank and / or the oil tank can be stably supported by the supporting plate, and the supporting plate itself can also be stably supported by the tank. Since the guide plate is integrally provided, the wind guide plate can also be stably supported, and it is possible to suppress the generation of noise due to the vibration of the wind guide plate, reduce the number of constituent members, and the mounting structure. It is possible to improve the cooling efficiency by the radiator fan and improve the continuous workability while achieving simplification, stabilization, and space saving.

Further, according to the second aspect of the invention, since the wind guide plate is also used as the mounting bracket for the sound absorbing material, the structure can be simplified and the number of constituent members can be reduced, and the mounting space can be reduced. The rationalization can be achieved, and the above-described improvement in cooling efficiency and noise reduction can be achieved all at once while achieving downsizing and space saving.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a frame structure of an excavating work machine according to an embodiment of the present invention.

FIG. 2 is a rear view showing a main part of a frame structure of the excavating work machine.

FIG. 3 is a right side view showing a main part of a frame structure of the excavating work machine.

FIG. 4 is a left side view showing a main part of a frame structure of the excavating work machine.

FIG. 5 is an overall plan view of the excavating work machine.

FIG. 6 is an overall left side view of the excavating work machine.

FIG. 7 is an overall right side view of the excavating work machine.

[Explanation of symbols]

 1 Excavator 20 Machine frame (swivel frame) 31 Radiator fan 32 Radiator device 36 Fuel tank 37 Oil tank 38 Support plate 60 Wind guide plate 61 Sound absorbing material

Claims (2)

[Claims] 1. An excavating work machine in which a fuel tank (36) and / or an oil tank (37) and a radiator device (32) having a radiator fan (31) are arranged on a machine body frame (20). In (1), a fuel tank (36) and / or an oil tank (37) are supported by a support plate (38) provided upright on the body frame (20), and a radiator fan (31) is supported by the support plate (38). A frame structure for an excavating work machine, which is integrally provided with a wind guide plate (60) that extends substantially in the axial direction and guides the flow of wind by the radiator fan (31). 2. The frame structure for an excavator according to claim 1, wherein a sound absorbing material (61) for absorbing noise generated by the radiator device (32) is supported by a wind guide plate (60).