JP3227356B2 - Excavator frame structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of an excavator such as a hydraulic shovel.

[0002]

2. Description of the Related Art In general, this type of excavator has a fuel tank and an oil tank disposed on a body frame, and these tanks are fixed to the body frame. Further, a radiator device having a radiator fan is provided at a rear portion of the body frame.

[0003]

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

[0004] Furthermore, there is a demand for reducing noise especially in the city. Accordingly, an object of the present invention is to provide a frame structure of an excavator that can achieve a reduction in the size of a body frame, an improvement in cooling efficiency, and a reduction in noise at once.

[0005]

The present invention takes the following technical means in order to solve the above problems. That is, according to the first aspect of the present invention, in an excavating machine in which a fuel tank and / or an oil tank and a radiator device having a radiator fan are disposed on a body frame, the body frame has a required height. A table is set up and this support
The support plate extends in the vertical direction, and the side surface of the fuel tank and / or the oil tank is attached and fixed to the support plate.
The tank was supported and attached to the support plate and the body frame
The rising frame is connected and integrated with the connecting frame by the connecting frame.
A fin-shaped frame is formed, and the support plate is provided integrally 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, so that the tank is stably provided by the support plate. Support and support
The board forms part of the arched frame to improve rigidity,
Since this support plate itself is also stably supported by the tank, and the wind guide plate is integrally provided on such a support plate,
The wind guide plate is also supported stably, and the generation of noise due to the vibration of the wind guide plate is suppressed, and while reducing the number of components, simplifying and stabilizing the mounting structure, and saving space,
Improve the cooling efficiency of the radiator fan.

According to the second aspect of the present invention, a sound absorbing material for absorbing noise generated in the radiator device is supported by the wind guide plate, so that the wind guide plate is also used as a mounting bracket for the sound absorbing material, thereby simplifying the structure. In addition, the number of constituent members is reduced, the mounting space is rationalized, and the above-described improvement in cooling efficiency and noise reduction are achieved while reducing the size.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show an excavator 1 according to an embodiment of the present invention, which is also called a hydraulic shovel or a backhoe. This excavator 1
Has a crawler-type traveling machine body 2 at a lower portion thereof, and a turning machine body 3 having a substantially circular shape in a plan view is mounted on the upper portion of the traveling machine body 2 so as to be capable of fully turning around a vertical axis. The turning body 3 has a turning radius smaller than the width of the left and right crawlers 4,
It improves workability in narrow places such as in town. Note that a dozer device 5 is mounted on a front portion of the traveling body 2.

[0008] A backhoe device 6 for performing excavation work is mounted at the front of the turning machine body 3, and a counterweight 7 for optimizing the front and rear weight balance is mounted at the rear. A driver's seat 8 is mounted on the turning machine body 3, and a step 9 for placing a foot is provided in a lower front part of the driver's seat 8. An operation lever 10 and an operation pedal 11 are provided on a 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. A left / right entrance 13 is provided on the left side of the driver's seat 8 and a sub entrance / exit 14 is provided on the right front side of the driver's seat 8 and also on the right side of the backhoe device 6. The simplicity and convenience have been improved.
A canopy 15 is provided above a driving unit including the driver's seat 8 and the like.

The turning body 3 is constructed by mounting a body cover 21 made of synthetic resin or metal, a hood 22 and the like on a body frame 20. Hereinafter, the frame structure according to the present embodiment will be described in detail. The body frame 20 includes a base plate 23 having a substantially circular shape in plan view. The base plate 23 is pivotally supported by the traveling machine body 2 and is pivotally driven by a pivot 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 form a substantially C-shape in plan view.
A mounting bracket 26 to which is mounted is provided.

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

The hood 22 is mounted on the rear side of the body cover 21 so as to be able to inspect the engine 28, the hydraulic pump 29, the radiator device 32 and the like so as to be opened and closed. The driver's seat 8 is provided with the body cover 2.
1 and the hood 22 are placed and mounted so that the driver's seat 8 is tilted forward when the hood 22 is opened. Note that the driver's seat 8 is
Instead of being placed on the upper portion of the hood 2, it can be arranged forward of the hood 22.

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

A fuel tank 36 and an oil tank 37 are provided at the front right of the body frame 20 (ie, in front of the radiator device 32). Above the tanks 36 and 37 is a hood 19 which can be opened and closed. By opening the hood 19, the tanks 36 and 37 can be easily and quickly replenished with fuel and oil.

The tanks 36 and 37 are mounted and fixed on a support table 40 provided on the base plate 23, and are mounted on a support plate 38 extending in the front-rear direction and erected on the body frame 20 (base plate 23). 3
6 and 37 are attached and fixed, so that both tanks 3
6 and 37 are stably supported by the support plate 38. Thus, the fuel tank 36 and the oil tank 37
If both are supported by one support plate 38, the number of constituent members can be reduced and the mounting structure can be simplified as compared with the case where a support member is provided for each of the tanks 36 and 37. The two tanks 36 and 37 are connected to each other to further improve the strength. Note that the fuel tank 36 or the oil tank 3
7 can be supported.

More specifically, the lower edge of the support plate 38 is bent in a substantially L-shape, and the bent portion 39 is welded and fixed to the upper surface of a support 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, over the front end of the base plate 23 and the middle part in the front-rear direction. That is, the support plate 38 is attached and fixed to the base plate 23 via the support 40 having a required height. The operation panel 12 is fixedly attached to the upper end of the support plate 38. By thus using the support plate 38 as a mounting member for the tanks 36 and 37 and the operation panel 12, the number of constituent members can be further reduced. Space saving can be achieved.

On the upper surface of the right end of the base plate 23, there is provided a pedestal 45 having a required height mainly constituted by a plurality of components 41, 42, 43, 44.
A plate-like member 46 serving as a support such as the body cover 21
However, it is welded and fixed so that the right outside is inclined backward. The upper end of the plate 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 substantially L-shaped support member 51, a column member 52, and a mounting member 53 supported at a required height by these two members 51, 52 are also provided. 54 are provided. A rising plate portion 5 extending upward is provided on the right edge of the mounting member 53.
5 are provided integrally. This rising plate portion 55
And the support plates 38 of the tanks 36 and 37 are connected and integrated by a pipe-shaped connection frame 56. Thus, the left and right pedestals 45 and 54, the support columns 46 (plate-like members), and the connection members 47 The support plate 38, the connection frame 56, and the like constitute an arch-shaped frame for supporting the body cover 21 and the hood 22 and improving the rigidity of the body frame 20.

The right support 16 of the canopy 15 is fixedly mounted on the upper surface of a connecting member 47 located at the upper right end, and the left support 17 is erected on the upper surface of the mounting member 53 located on the left side. It is attached and fixed to the upper end of the intermediate support 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 mounted more stably, and thus the fuel tank 36 and the oil tank 37 Can be more stably supported, and the rigidity of the body frame 20 can be increased by the two tanks 36 and 37, and the structure is increased by using a small number of constituent members by reinforcing each other. Can be.

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 which guides the flow of the wind by the wind is provided integrally. In the present embodiment, the wind guide plate 60 is disposed adjacent to the front of the radiator fan 31 and extends inward in the left-right direction from the rear edge of the support plate 38. In addition, the wind guide plate 60 is directly attached to the base plate 23.
Or, by indirectly welding and fixing via a bracket, the mounting strength of the wind guide plate 60 is improved, and the wind guide plate 60 prevents the support plate 38 from falling 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
On the side surface (rear surface) on the side, a sound absorbing material 61 that absorbs noise generated by the radiator device 32 is adhered and supported. The sound absorbing material 61 is substantially plate-shaped, extends to the right outside of the radiator device 32, and is held between the radiator 30 and the oil tank 37 in a sandwiched manner. Further, on the right side of the radiator 30, the radiator 30 is adhered and supported by the plate-shaped member 46. As the sound absorbing material 61, various materials other than those made of foamed resin can be adopted.

As described above, the wind guide plate 60 and the plate-like member 4
By also using 6 as a mounting member for the sound absorbing material 61, the number of constituent members can be reduced, and the size of the turning body 3 can be further reduced. Further, since the noise is reduced by the sound absorbing material 61, the environmental performance can be improved, and the radiator fan 31 can be improved by the sound absorbing material 61.
Can be guided from the inside of the machine to the exhaust port 35 to make it smooth, and the cooling efficiency of the radiator device 32 can be improved.

The present invention is not limited to the above-described embodiment, and can be appropriately changed in design. 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.
May be arranged on the left and right sides of the base plate 23 in an inclined manner. The radiator fan 31 can be driven by a separately provided electric motor.

[0023]

According to the first aspect of the present invention, the fuel tank and / or the oil tank can be stably supported by the support plate, and the support plate itself can be stably supported by the tank. Since the guide plate is provided integrally, the wind guide plate can be stably supported, the generation of noise due to the vibration of the wind guide plate can be suppressed, the number of components is reduced, and the mounting structure is reduced. , The cooling efficiency of the radiator fan can be improved, and the continuous workability can be improved.

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

[Brief description of the drawings]

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

FIG. 2 is a rear view showing a main part of a frame structure of the excavator.

FIG. 3 is a right side view showing a main part of a frame structure of the excavator.

FIG. 4 is a left side view showing a main part of a frame structure of the excavator.

FIG. 5 is an overall plan view of the excavator.

FIG. 6 is an overall left side view of the excavator.

FIG. 7 is an overall right side view of the excavator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excavation work machine 20 Airframe (rotating frame) 31 Radiator fan 32 Radiator device 36 Fuel tank 37 Oil tank 38 Support plate 60 Wind guide plate 61 Sound absorbing material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-81367 (JP, A) JP-A-7-237458 (JP, A) JP-A 3-127027 (JP, U) JP-A 6-237458 (JP, U) 83438 (JP, U) Japanese Utility Model 2-68214 (JP, U) Japanese Utility Model Utility Model 3-59423 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02F 9/00

Claims (2)

(57) [Claims] An excavator in which a fuel tank (36) and / or an oil tank (37) and a radiator device (32) provided with a radiator fan (31) are arranged on a body frame (20). In (1), a support stand (40) having a required height is installed on the body frame (20).
The support plate (40) extends in the front-rear direction on the support base (40).
8), and the fuel tank (3) is mounted on the support plate (38).
6) and / or the side of the oil tank (37) is attached and fixed
To support the tanks (36) and (37) , and attach the support plate (38) to the body frame (20).
The connecting plate (55) is connected by a connecting frame (56).
The support plate
(38) A frame for an excavator, wherein a wind guide plate (60) extending substantially in the axial direction of the radiator fan (31) and guiding the flow of wind by the radiator fan (31) is integrally provided. Construction. 2. A frame structure for an excavator according to claim 1, wherein a sound absorbing member for absorbing noise generated by the radiator device is supported by a wind guide plate.