JP2002327456A - Upper revolving body for construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the maintenance ease of various kinds of equipment arranged in a rear portion of an upper revolving body of construction equipment. SOLUTION: According to the construction equipment, right and left partitive hoods 7a, 7b are arranged on an upper portion of a housing 4 of the upper revolving body, and the hoods 7a, 7b are rendered rotatable by means of a hinge arranged at the center of a vehicle body, such that they each assume a lower closed position and an upper opened position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper revolving structure of a construction machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art Generally, in a construction machine such as a hydraulic shovel, an upper revolving superstructure is continuously provided above a lower traveling superstructure.
A boom is provided at the center of the upper revolving unit, a cab for the driver's cab is provided on the left side of the front part, a hydraulic oil tank is provided on the right side of the front part,
Arrange the fuel tank and control valve respectively,
An engine, a hydraulic pump, a radiator and the like are arranged at a rear portion.

In this type of construction machine, for example, an engine,
In consideration of the maintainability around the hydraulic pump and the radiator, various devices are laid out in the limited space of the upper revolving frame, and the inspection door is located on the rear side of the upper revolving frame. (Side doors) are provided, and the operator can perform maintenance on various devices by opening the inspection door.

[0004]

However, in the above-mentioned conventional structure, it is difficult not only to effectively dispose various devices in a limited small space especially at the rear portion of the upper revolving structure, but also to the right and left side portions. However, it is difficult to perform maintenance of various devices, for example, inspection around the engine, maintenance, and replenishment of fuel, oil, and the like only by providing the inspection door.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides an upper revolving structure of a construction machine capable of improving the maintainability of various devices disposed at the rear of the upper revolving structure. It is intended to do so.

[0006]

In order to achieve the above object, an upper revolving structure of a construction machine according to the present invention has a structure in which an upper revolving structure is rotatably provided above a lower traveling structure. , A hood having a left-right split structure is provided on an upper portion of the upper revolving structure frame.

According to the present invention, the upper portion of the machine room in which various devices including the engine are arranged can be fully opened with a very simple structure, so that the engine, hydraulic pump, and radiator can be opened. Various inspections, such as maintenance and replenishment of fuel and oil, etc., can be easily performed, and maintenance of various devices can be easily performed, thereby greatly improving maintainability as compared with the conventional structure.

In the present invention, each of the left and right divided portions of the hood is preferably rotatable between a lower closed position and an upper open position by a hinge provided at a central portion of the vehicle body in the left-right direction. By doing so, the left and right sides of the machine room can be opened greatly upward, so that operators can easily perform maintenance of various equipment even from the ground, improving maintainability. Can be achieved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of an upper revolving structure of a construction machine according to the present invention will be described with reference to the drawings.

FIG. 1 is a left side view of a hydraulic shovel according to an embodiment of the present invention, and FIG. 2 is a rear view of the hydraulic shovel. However, the working machines are omitted in these figures.

In the hydraulic excavator 1 of the present embodiment,
A lower traveling body 3 that is driven by the crawler belt 2 is provided, and an upper revolving superstructure 4 is pivotably provided above the lower traveling body 3. One side of this revolving superstructure 4 (left side)
A cab 5 for the driver's cab is provided, and although not shown in the drawing, a boom is provided at a substantially central portion of the upper swing body 4 between a pair of left and right boom brackets with its base end pivotally supported. ing.

In the upper revolving unit 4, a housing (frame) 6 is provided so as to surround a lower right portion and a rear portion of the cab 5. The housing 6 houses an engine, a hydraulic pump, a radiator, a counterweight, a hydraulic oil tank, a fuel tank, and the like.

The outer surface of the housing 6 has a substantially flat lower surface, a curved surface whose upper surface is gently raised toward the center, and a combination of left and right side surfaces and a rounded convex curved surface. And has a flat disk-shaped rear portion as a whole.

A hood 7 is provided on the upper surface of the rear part of the housing 6. The hood 7 has a left / right divided structure with a left / right center part as a boundary, and the left and right divided parts (left hood 7a and right hood 7b) have a central part as a pivot point in a lower closed position and an upper open position. It is configured to be rotatable between and.

More specifically, as shown in a partial cross-sectional view in the left-right direction of FIG. 3A, a left hood 7a is fixed to a support bracket 8 fixed to a central portion via hinges 9 and 9, respectively. And the right hood 7b is attached, and each hood 7a, 7b is rotated by the extension operation of the pneumatic cylinders 10, 10 (see FIG. 5) as shown by arrows A and B in FIG. The upper half can be opened widely.

In this manner, the left and right hoods 7a, 7b
Is opened in a fully open state, various devices such as an engine and other hydraulic pumps and a radiator housed in the housing 6 can be freely accessed from above. Therefore, inspection of these devices,
It becomes extremely easy to perform maintenance and the like or to supply fuel, oil, and the like. After maintenance, the pneumatic cylinders 10, 10 are contracted to
The hoods 7a, 7b can be returned to the original lower closed position. Needless to say, this equipment can be maintained by opening only one of the hoods 7a and 7b on one side. FIG. 4 is a left side view in a state where only the right hood 7b is opened.

The hydraulic excavator 1 according to the present embodiment is constructed as described above, and performs a difficult maintenance work which has conventionally been performed by opening a side door disposed on the rear side of the housing. Because it can be opened to a large extent, the maintainability has been significantly improved. Moreover, since the structure is extremely simple, it can be said that the implementation effect is extremely large.

FIG. 3 (b) shows another embodiment of the hood mounting portion structure.

In this embodiment, the first pivot pins 11, 1 are provided on the lower surface of the support bracket 8A fixed to the center.
1, one end of the first link 12, 12 is pivotally supported,
A second pivot pin 1 is attached to the other end of the first link 12.
One ends of the second links 14 and 14 are pivotally supported via the third and third links 13, 13, and the hoods 7 a and 7 b are pivotally supported on the other ends of the second links 14 and 14 via the third pivot pins 15 and 15. It is the structure which was done.

With such a configuration, the pneumatic cylinder 1
When the hoods 7a and 7b are opened by the operations of 0 and 10, the hoods 7a and 7b temporarily move upward in parallel by the rotation about the first pivot pins 11 and 11, and thereafter the third pivots are moved. The hoods 7a, 7b are opened by the rotation about the support pins 15, 15 as the center of rotation. Thus, food 7
a and 7b while avoiding interference between the hoods 7a and 7b and the support bracket 8A.
Can be opened. In the present embodiment, the seal members 16, 16 are interposed between the upper surface of the support bracket 8A and the lower surfaces of the hoods 7a, 7b.
In the closed state of a and 7b, the structure is such that water can be stopped.

In this embodiment, an example in which the present invention is applied to a hydraulic excavator has been described. However, it is needless to say that the present invention can be applied to other construction machines.

[Brief description of the drawings]

FIG. 1 is a left side view of a hydraulic shovel according to an embodiment of the present invention.

FIG. 2 is a rear view of the excavator according to the embodiment.

FIGS. 3A and 3B are partial cross-sectional views showing a structure of a hood attachment portion.

FIG. 4 is a left side view of the hydraulic excavator shown in a hood opened state.

FIG. 5 is a rear view of the hydraulic excavator shown in a hood opened state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 4 Upper revolving structure 5 Cab for driver's cab 6 Housing (frame) 7 Hood 7a Left hood 7b Right hood 8,8A Support bracket 9 Hinge 10 Pneumatic cylinder 11,13,15 Pivot pin 12,14 Link

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Maki Naruse 3-1-1 Ueno, Hirakata-shi, Osaka Inside the Osaka Plant of Komatsu Ltd. F-term in the Awazu Plant (Reference) 2D015 CA03

Claims (2)

[Claims] 1. A construction machine in which an upper revolving structure is rotatably provided on an upper portion of a lower traveling structure, wherein a hood having a left-right split structure is provided on an upper portion of an upper revolving structure frame. body. 2. The construction according to claim 1, wherein each of the left and right divided portions of the hood is rotatable between a lower closed position and an upper open position by a hinge provided at a central portion of the vehicle body in the left and right direction. Revolving superstructure of the machine.