JP2539692B2 - Counterweight of upper swing construction machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a counterweight of an upper swing type construction machine such as a power shovel, and particularly, it also serves as an engine enclosure, has good soundproofing characteristics, and has a very small swing. The present invention relates to a counterweight for an upper-slewing construction machine that enables

[Conventional technology]

A standard power shovel, which is a conventional upper swing construction machine, has a structure as shown in FIG. That is, FIG. 4A is a top view and FIG.
The figure is a left side view. In the figure, 1 is a traveling mechanism. Reference numeral 2 denotes an upper revolving structure, on which a driver's cab 3, an engine room 4, and a working machine 6 are mounted.

In order to perform work with the power shovel, an operator sitting in the cab 3 is driven by pressure oil created by a hydraulic pump (not shown) driven by an engine (not shown) mounted inside the engine room 4. The traveling mechanism 1 is operated to travel, and the working machine 6 driven by an engine (not shown) is operated to perform excavation work.

Further, the upper revolving structure 2 can be freely revolvingly driven above the traveling mechanism 1 by the pressure oil produced by the hydraulic pump (not shown) driven by the engine (not shown).

The upper revolving superstructure 2 balances the weight of the upper revolving superstructure with the counterweight 5 to ensure the stability of work by the power shovel.

In addition, inside the engine room 4 mounted on the right side of the upper revolving structure, as shown in FIG.
The fan 13, the engine and the peripheral mechanism 14 of the engine, the hydraulic pump and the related equipment 16 are arranged in a line, and the counterweight 5 is attached to the rear portion thereof.

Further, 12 is a shroud for preventing cooling air flow from the fan from leaking, and 15 is a muffler for exhaust gas discharged from the engine.

FIG. 6 shows another example of the structure in which the engine is mounted on the upper revolving superstructure 2. Inside the rear outer casing of the upper revolving superstructure 2, the radiator 11, the fan 13, the engine, and the peripheral mechanism 14 of the engine are provided. , The hydraulic pump and the related equipment 16 are arranged side by side in a row, and the counterweight 5 is attached to the rear portion thereof.

Further, 12 is a shroud for preventing the cooling air flow from the fan from leaking, 15 is a muffler for exhaust gas discharged from the engine, and the exhaust port from the muffler is provided in the upper part of the engine room in a large machine. A small machine is installed behind the engine room.

Further, in order to prevent noise, it is also practiced to lower the rotation speed of the fan to enhance noise characteristics.

[Problems to be Solved by the Invention]

According to the above-mentioned conventional method, in the structure shown in FIG. 5, the length from the radiator to the hydraulic pumps becomes long, so that the engine room becomes long. That is, there is a problem that the turning diameter becomes large because the length of the upper revolving superstructure becomes long. With the structure shown in FIG. 6, it is necessary to put the operator's cab forward and workability is poor. Therefore, the length of the operator room section becomes long. Since the vertical width becomes wide, there is a problem that the turning diameter becomes large.

Further, in any of the examples shown in FIGS. 5 and 6,
Since neither the intake duct nor the exhaust duct can have a margin, it is difficult to improve noise performance for preventing noise.

In addition, lowering the rotation speed of the fan to improve the noise characteristic has a negative aspect that the heat balance characteristic is sacrificed.

Further, if the exhaust port from the muffler is provided in the upper part of the engine room, it is difficult to prevent noise, especially when it is small, and hot air is applied to the cab. The appearance design is difficult,
There were some problems. Further, in any of the examples shown in FIGS. 5 and 6, the counterweight cannot be used for any purpose other than the weight because of the structure of the equipment to be installed and the rear structure of the upper swing body, so that the structure is useless. I was physically.

The present invention solves the above-mentioned conventional problems, shortens the size of the upper swing body, has good noise prevention characteristics, and forms a part of the engine enclosure by giving the counterweight a function other than the weight. It is intended to provide counterweight.

[Means for solving the problem]

In order to achieve the above object, in the engine enclosure of the upper swing type construction machine according to the present invention, the traveling device (1)
Upper revolving structure (2) rotatably mounted on the upper part of the vehicle, a working machine and a cab arranged in front of the upper revolving structure (2), and a substantially constant revolving from the revolving center of the upper revolving structure (2). Between the counterweight (5) having a radius and arranged behind the upper swing body (2), the working machine and the cab, and the counterweight (5), and being juxtaposed with the counterweight (5). A counterweight (5) comprising: a radiator (11) placed laterally, a fan (13), an engine room (4) accommodating an engine and an engine peripheral mechanism (14), and a counterweight (5). ), The intake duct (a) provided on the counterweight (5) connected to the engine room (4) in front of the working machine and the driver's cab, and at one end side in the width direction of the upper swing body, Constant An exhaust duct (25) provided in the counterweight (5) connected to the engine room (4), which is formed of a passage partitioned by a partition plate (27) inside the counterweight (5) having a turning radius and separated by a predetermined distance. ) And is directed to the ground side under the counterweight (5),
Further, the counterweight of the upper-swing construction machine is characterized by having an exhaust port (26) connected to the exhaust duct (25).

[Action]

According to the above means, the engine is mounted at the rear of the upper revolving structure or at an angle with an angle between the radiator and the radiator, so that the driver's cab can be arranged with a margin and the turning radius can be reduced. In addition, the intake duct and the exhaust duct to which the sound absorbing material is attached are lengthened so that the exhaust gas and the cooling air that has become warm air are discharged to the lower rear part of the vehicle body, so that the engine-related equipment can be completely covered. In addition to being able to reduce noise to an extremely low level, in the case of a small machine, there was no risk of hot exhaust gas or warm air coming into the cab, and the degree of freedom in external design could be increased.

Further, since the counterweight also serves as the intake duct, the exhaust duct and other outer casing of the engine room, the price can be reduced.

〔Example〕

Hereinafter, the details of the engine enclosure of the upper swing type construction machine according to the present invention will be described with reference to the drawings.

FIG. 1 is a diagram of a power shovel, which is a typical example of an engine enclosure for an upper-slewing construction machine according to the present invention.
FIG. 3 is a top cutaway view showing an upper revolving structure of a power shovel for explaining an example of mounting a device inside an engine enclosure, and FIG.

In FIG. 1, (A) is a top view of the power shovel, and (B) is a left side view. In the figure, 1 is a traveling device. 2 is an upper revolving structure, and is a cab 3,
The engine room 4 and the working machine 6 are installed.

In order to perform work with a power shovel, an operator sitting in the cab 3 is driven by pressure oil created by a hydraulic pump (not shown) driven by an engine (not shown) mounted inside the engine room 4. The traveling device 1 is operated to move, and the excavation work is performed by operating the working machine 6 driven by pressure oil produced by a hydraulic pump (not shown) driven by an engine (not shown). To do.

Further, the upper-part turning body 2 can be freely turned and driven on the upper part of the traveling device 1 by pressure oil produced by a hydraulic pump (not shown) driven by an engine (not shown).

Further, the upper revolving superstructure 2 balances the weight of the upper revolving superstructure 2 with the counterweight 5 to ensure the stability of work by the power shovel. Also,
The engine room 4 installed at the rear of the upper swing body 2 includes the R surface 5-1 of the counterweight 5, the plate body 24, and the upper plate 4-.
1 and a lower plate 4-2. Inside, as shown in FIG. 2, the radiator 11, the fan 13, the engine and the peripheral equipment 14 of the engine, the hydraulic pump and the related equipment 16 are arranged at an angle. Are arranged with. Further, 12 is a shroud for preventing cooling air flow from the fan from leaking, and 15 is a muffler for exhaust gas discharged from the engine.

The engine 1 and the related device 16 described above are mounted inside an outer casing 23 having a counterweight function.

Further, 18 is an oil tank for the hydraulic circuit of the working machine, 19 is a fuel tank, 20 is an operator seat in the cab, and 21
Is a speed control lever of the running engine, and 22 is a lever and pedals for running and operating the working machine.

In the figure, an arrow a is an intake duct having a counterweight 5 forming its outer wall, a radiator 11 is attached to be inclined with respect to an upper revolving structure, and a shroud deformed to change the flow direction of air. Behind 12, there are a fan 13 and an engine 14 mounted. The engine 14 is also mounted on the upper revolving structure 2 at an angle different from that of the radiator 11. Therefore, the engine 14 and the fan mounted obliquely with respect to the upper swing body 2
In contrast to 13, the intake duct (a) formed parallel to the side surface of the upper revolving structure 2 is curved.

Exhaust gas from the muffler 15 coupled to the rear part of the engine 14, that is, the flow of the gas shown by the arrow (b), passes through the exhaust duct 25 formed by the inner surface of the rear part of the counterweight 5 and the partition plate 27, and the upper part. From the lower right side of the rear portion of the revolving structure 2, the exhaust air is exhausted from the lower exhaust port 26 of the engine room 4 as shown by the arrow (C). Further, the cooling air sucked from the arrow (a) also becomes warm air and is exhausted through the exhaust duct 25 as shown by the arrow (c).

Further, a sound absorbing material is attached all over the periphery of the engine 14, that is, the inner surface of the engine room 4, the muffler 15, the intake duct (a) and the exhaust duct 25. In the figure, a shaded portion 17 indicates the sound absorbing material attached portion, and among the sound absorbing materials, heat-resistant sound absorbing materials such as around the exhaust duct 25 and around the muffler 15 are used. Since the counterweight 5 for balancing the weight of the upper revolving superstructure described above has the weight of the engine 14 slanted rearward, the weight is taken into consideration and the upper revolving superstructure 2 together with the side surface of the intake duct (a). Rear outer casing
It is also formed as 23.

FIG. 3 shows an embodiment of the counterweight 5. In the figure, the portion a also serves as the side wall of the intake duct portion, and the rear portion also serves as the side wall of the exhaust duct portion.

〔The invention's effect〕

As described above, according to the present invention, since the engine is mounted at the rear of the upper swing body or at the rear of the upper swing body with an angle formed between the radiator, the driver's cab can be arranged with a small swing radius. I was able to do it. Also, by installing an intake duct and an exhaust duct with sound absorbing material attached, exhaust gas and warmed cooling air can be exhausted to the lower rear part of the vehicle body, so that engine-related equipment can be completely covered, It is possible to reduce the noise of the car to an extremely low level, there is no danger of hot exhaust gas or warm air being applied to the cab, and it is possible to increase the degree of freedom in external design.

Further, since the counterweight also serves as the intake duct, the exhaust duct, and the outer casing of the other engine, it is possible to obtain an excellent effect that the price can be reduced.

[Brief description of drawings]

FIG. 1 is a power shovel diagram according to the present invention. FIG. 2 is a diagram showing an example of equipment mounting in a power shovel upper revolving structure according to the present invention. FIG. 3 is an example of a counterweight structure based on the present invention. Fig. 4 is a conventional power shovel diagram. FIG. 5 is a layout view of a conventional engine peripheral equipment device in an upper turning body. FIG. 6 is a layout view for each of the conventional peripheral engine devices in the upper swing body. 1 …… Traveling mechanism 2 …… Upper revolving structure 3 …… Operating room 4 …… Engine room 5 …… Counterweight 6 …… Working machine 11 …… Radiator 12 …… Shroudon 13 …… Fan 14 …… Engine and engine Peripheral mechanism 15 …… Muffler 16 …… Hydraulic pump and related equipment 17 …… Sound absorbing material 18 …… Oil tank 19 …… Fuel tank 20 …… Operator seat 21 …… Speed control lever 22 …… Lever and pedals 23 …… Outer casing 25 …… Exhaust duct 27 …… Partition plate A …… Partition plate

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Claims (1)

(57) [Claims] 1. An upper revolving structure (2) rotatably mounted on the upper part of a traveling device (1), a working machine and a cab arranged in front of the upper revolving structure (2), and an upper revolving structure ( Upper revolving superstructure (2) having a substantially constant turning radius from the turning center of 2)
Between the counterweight (5) arranged behind the counterweight (5), the working machine and the operator's cab, and the counterweight (5), and the radiator (11) placed laterally in parallel with the counterweight (5), A counterweight (5) for an upper-slewing construction machine having a fan (13), an engine, and an engine room (4) accommodating an engine peripheral mechanism (14). Side, and an intake duct (a) provided on a counterweight (5) provided on one end side in the width direction of the upper revolving structure and connected to the engine room (4), and a counterweight having a substantially constant turning radius. Exhaust provided in the counterweight (5) that is formed inside the (5) by a partition plate (27) separated by a predetermined distance and is connected to the engine room (4). An upper swing construction machine characterized by having an air duct (25) and an exhaust port (26) directed to the ground side below the counterweight (5) and connected to the exhaust duct (25). Counterweight (5).