JP2000064349A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct the intake of an engine adapted to various work environment by changing the direction of an outside-air introducing pipe for an air cleaner. SOLUTION: The inside of an engine room 15 is partitioned into an engine room, an outside-air introducing room 17 and a cleaner housing room 18 by partition plates 11, 12, 13. A communicating hole 12A is bored to the second partition plate 12, and a partition plate 23 having a communicating hole 23A is installed into the cleaner housing room 18 and a dust separating room 24 is parted, and a communicating hole 9A is bored to the top-face cover 9 of the machine room 15. The outside air is introduced from the outside-air introducing room 17 at the time of the sideway direction, introduced from the dust separating room 24 at the time of the downward direction and induced from a pre-cleaner connected at the front end of the outside-air introducing pipe 26C at the time of the upward direction by changing the direction of the outside- air introducing pipe 26C by using a supporting band 28, on which an air cleaner 25 is mounted, in response to work environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine suitable for use in, for example, excavating earth and sand.

[0002]

2. Description of the Related Art Generally, as a construction machine according to the prior art, a frame, a building cover which is provided in the frame and defines a machine room, an engine provided in the building cover, and an inside of the building cover. There is known an air cleaner provided with an air cleaner connected to an intake side of the engine via an intake pipe.

Here, in the prior art, the outside air introduction port of a normal air cleaner is opened at a position upstream of a radiator and an oil cooler in a machine room, and dust in intake air is removed and cleaned by the air cleaner. Air is supplied to the engine through an intake pipe.

[0004]

By the way, in the system in which the outside air introduction port of the air cleaner is simply opened to the machine room, when used in a work environment with a large amount of dust, a large amount of dust inside the air cleaner passes through the outside air introduction port along with the outside air. However, there is a problem that the filter element is clogged early.

Therefore, when the construction machine is moved from the average work environment to the work environment with much dust, it is necessary to change to another method such as adding an additional air cleaner to the air cleaner each time. However, there is a problem that a great deal of time is spent on the change work.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a construction machine capable of taking dust-proof measures suitable for a work environment by a simple work.

[0007]

In order to solve the above-mentioned problems, the invention of claim 1 provides a frame, a building cover which is provided in the frame and defines a machine room, and a building cover provided in the building cover. A construction machine equipped with an engine and an air cleaner provided in the building cover and connected to an intake side of the engine via an intake pipe, an air cleaner is circumferentially movable at a tip of the intake pipe. The external air introducing port is attached to the peripheral wall of the air cleaner, and the position of the external air introducing port is selected by changing the circumferential position of the air cleaner with respect to the intake pipe.

With this configuration, the air cleaner can be rotated to change the circumferential position of the air cleaner so that the position of the outside air introduction port can be directed to, for example, the lateral side, the lower side, or the upper side. The outside air inlet can be opened in a different space depending on the position.

Further, the feature of the means adopted by the invention of claim 2 is that the outside air introduction port of the air cleaner has a position opened in the machine chamber and a position opened in a dust separation chamber defined separately in the machine chamber. The position where it projects from the building cover to the outside and the additional air cleaner is attached is selected.

With this structure, for example, when the outside air introduction port of the air cleaner is located at the position where it opens in the machine room, the outside air is introduced directly from the machine room into the air cleaner, and dust is removed only by the air cleaner. ,
It can be applied to a work environment with relatively little dust.

Further, when the outside air introduction port is located at the position where it is opened to the dust separation chamber defined separately in the machine chamber, the outside air is introduced into the air cleaner through the dust separation chamber, and large dust is removed in this dust separation chamber. Therefore, it can be applied to a work environment with a relatively large amount of dust.

Further, when the outside air introduction port is projected outside from the building cover to a position where the additional air cleaner is attached, the outside air is introduced into the air cleaner through the additional air cleaner and a large amount of dust can be removed by the additional air cleaner. It can be applied to a very dusty work environment.

According to the third aspect of the present invention, the air cleaner is formed as a cylindrical container provided with the outside air introduction port protruding in the radial direction, and the frame or the building cover is provided with a support member for supporting the peripheral wall of the air cleaner. There is that.

As described above, since the air cleaner to be the cylindrical container is supported on the frame or the building cover by using the supporting member for the peripheral wall, the circumferential position of the air cleaner is changed by loosening the supporting member. The position of the outside air introduction port can be easily changed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hydraulic excavator will be described below as an example of a construction machine according to the present invention with reference to FIGS. 1 to 9.

Reference numeral 1 denotes a lower traveling body, 2 denotes an upper revolving body rotatably mounted on the lower traveling body 1, and the upper revolving body 2 has a revolving frame 3 as a frame and a cab 4 on the front left side. The building cover 5 is provided from the center to the rear side, and the counterweight 6 and the like are provided on the rear side. A working device 7 for excavating earth and sand and the like is provided in the front center of the revolving frame 3.

Here, the revolving frame 3 includes a pair of center frames 3A, 3A (only one of which is shown) extending in the front-rear direction and spaced apart in the left and right directions toward the center, and the left and right sides of the respective center frames 3A. The left and right side frames 3B, 3B (only one of which is shown) extending in parallel with being separated from each other in the left-right direction extend in the left-right direction so as to connect the center frame 3A and the side frame 3B, and are arranged in rows from rear to front A plurality of extended beams 3C, 3D and 3E, and the extended beam 3
The radiator support 3F is installed between C and 3D, and the bottom side of these is undercover 3G.
Is covered by.

The building cover 5 is used for the machine room 1 which will be described later.
The building cover 5 is a swing frame 3
Above, the left and right side covers 8 and 8 (only one is shown) which are erected upward from both left and right sides of the revolving frame 3.
And an upper surface cover 9 having an engine inspection window provided so as to be combined with the upper end side of each side cover 8, and an engine cover provided to cover the engine inspection window.
It is composed of 10 and. In addition, on the top cover 9,
As shown in FIG. 3, a communication hole 9A that communicates a cleaner storage chamber 18 described later to the outside is formed, and the communication hole 9A is always covered by a cover plate 9B.

Reference numeral 11 denotes a first partition plate which is positioned rearward of the revolving frame 3 and which is erected so as to extend in the left-right direction. 12 is positioned in front of the first partition plate 11 and stands substantially in parallel. The second partition plate, 13 is a third partition plate which is positioned in front of the second partition plate 12 and which is erected substantially parallel to the second partition plate 12. The first partition plate 11 and the second partition plate A fourth partition plate 14 extending in the front-rear direction is erected between the partition plate 12 and the partition plate 12. Further, the second partition plate 12 has a communication hole 1 for communicating an outside air introducing chamber 17 and a cleaner accommodating chamber 18, which will be described later.
2A is drilled.

A machine room 15 is defined by the building cover 5 on the revolving frame 3, and the machine room 15 is surrounded by a first partition plate 11, a second partition plate 12 and a fourth partition plate 14. The engine compartment 16 and the first partition plate 11,
The outside partition chamber 17 surrounded by the second partition plate 12, the fourth partition plate 14 and the side cover 8, and the second partition plate 1.
It is divided into a cleaner housing chamber 18 and the like surrounded by the second and third partition plates 13 and the side cover 8. And
Outside air flows into the outside air introduction chamber 17 through a louver (not shown) formed on the top cover 9 or the like.

Reference numeral 19 denotes an engine which is located in the engine room 16 of the machine room 15 and is mounted on the revolving frame 3. The engine 19 has an air intake port 19A to which a base end of an intake pipe 20 described later is connected. Has been formed.

Reference numeral 20 denotes an intake pipe connecting an air intake port 19A of the engine 19 and an intake lead-out pipe 26D of an air cleaner 25, which will be described later, and the intake pipe 20 is formed in a cylindrical shape, and the middle thereof is bent into a substantially L-shape. By bending the engine room 16
From the cleaner storage chamber 18. And
The intake pipe 20 supplies the air cleaned by the air cleaner 25 to the engine 19.

Reference numeral 21 denotes a radiator provided near the engine 19 and provided on the revolving frame 3, and the radiator 21 is fitted to the fourth partition plate 14 and has a leg 21A.
It is mounted on the radiator support base 3F of the revolving frame 3 via. Further, the engine 19 is provided with a cooling fan 19B for flowing the outside air into the outside air introduction chamber 17 toward the radiator 21.

Reference numeral 22 denotes a dustproof plate provided on the second partition plate 12, and the dustproof plate 22 is formed into a substantially rectangular box shape by bending the plate body, and opens downward. And
Connect the outside air introducing pipe 26C of the air cleaner 25 to the second partition plate 1
When it is inserted into the second communication hole 12A, the outside air introduction pipe 26C
The opening of is covered with a dustproof plate 22. This allows
The dustproof plate 22 introduces the air in the outside air introduction chamber 17 into the outside air introduction pipe 26C from the lower side of the dust prevention plate 22, and prevents dust, rainwater, and the like from being sucked into the outside air introduction pipe 26C. .

Reference numeral 23 denotes a compartment plate located in the cleaner accommodating chamber 18 and provided on the third partition plate 13. The compartment plate 23 is a substantially rectangular box-like shape that opens downward by bending the plate body. Is formed in. A communication hole 23A is formed on the upper surface of the compartment plate 23. Furthermore, the drawing board 23
As a result, the dust separation chamber 24 is provided below the cleaner chamber 18.
When the outside air is introduced from the lower side of the chamber plate 23 to the upper side through the communication hole 23A, the dust separation chamber 24 is configured to drop heavy dust and the like and separate the outside air from the outside air. is there.

Reference numeral 25 is an air cleaner located in the cleaner accommodating chamber 18 and connected to the tip of the intake pipe 20. As shown in FIGS. 4 and 5, the air cleaner 25 has a bottom from a peripheral wall 26A and a bottom 26B. The casing 26 has a cylindrical shape, a filter element 27 housed in the casing 26, and a lid 27A that covers the opening of the casing 26.

Further, on the peripheral wall 26A of the casing 26,
An outside air introduction pipe 26C, which is located on the side surface and serves as an outside air introduction port for sucking outside air into the casing 26, is provided so as to project in the radial direction. An intake lead-out pipe 26D is projectingly provided at the center of the bottom portion 26B, and the tip of the intake pipe 20 is connected to the intake lead-out pipe 26D. Further, in the casing 26, a long threaded portion 26E extending in the axial direction from the central portion is provided.
4, the long thread portion 26E is provided with the filter element 27 in the casing 26 with the filter element 27 inserted in the casing 26, as shown in FIG.
A wing nut 26F for fixing the inside is attached, and similarly, a wing nut 26G for fixing the lid 27A to the casing 26 is attached. Since the intake lead-out pipe 26D of the casing 26 is connected to the tip of the intake pipe 20, the air cleaner 25 is movably attached in the circumferential direction around the intake lead-out pipe 26D by loosening a support band 28 described later. There is.

Reference numeral 28 denotes a support band as a support member for supporting the peripheral wall 26A, and the support band 28 has a central portion attached to the third partition plate 13 by bolts and nuts 29 as shown in FIG. U-shaped mounting bracket 2
8A, a band portion 28B that is fixed to both ends of the mounting bracket 28A, is formed in a substantially C shape, and is located at both ends of the band portion 28B, and is surrounded by the band portion 28B from the periphery of the casing 26. Tightening bolt 2
8C and. And the support band 28
Loosens the tightening bolt 28C,
In contrast to this, the circumferential position of the air cleaner 25 is allowed to be changed, and the position of the outside air introducing pipe 26C is selectively adjusted.

Reference numeral 30 shown in FIGS. 8 and 9 is a precleaner as an additional air cleaner.
Before the outside air is introduced into the air cleaner 25, the centrifugal force or the like is used to remove dust, sand, and the like.

The hydraulic excavator provided with the engine intake system according to the present embodiment is constructed as described above. Next, the mode of use will be described with reference to FIGS. 2, 3 and 6 to 9. .

First, the case where the hydraulic excavator is used in an average working environment, that is, a working environment in which dust is relatively small will be described.

In this case, as shown in FIG. 2 and FIG.
The air cleaner 25 is attached to the position where the outside air introducing pipe 26C is directed to the lateral side (substantially horizontal direction) by the support band 28, and the outside air introducing pipe 26C is inserted into the communication hole 12A and opened in the dustproof plate 22. Thereby, the outside air introduction pipe 2
6C opens into the outside air introduction chamber 17 through the dustproof plate 22,
The outside air in the outside air introducing chamber 17 is introduced directly into the air cleaner 25. Then, a part of the outside air taken into the outside air introducing chamber 17 is introduced into the air cleaner 25 through the dustproof plate 22 and the outside air introducing pipe 26C as shown by an arrow in FIG. 3, and the filter element 27 removes dust. After being cleaned, the air is supplied to the engine 19 through the intake pipe 20.

Next, the case where the hydraulic excavator is used in a work environment with much dust compared to the average work environment will be described.

In this case, as shown in FIGS. 6 and 7,
By loosening the tightening bolt 28C of the support band 28, the air cleaner 25 is rotated to a position where the outside air introducing pipe 26C faces downward, and the outside air introducing pipe 26C is fixed to the compartment plate 2.
3 through the communication hole 23A to open in the dust separation chamber 24. As a result, a part of the outside air taken into the outside air introducing chamber 17 is, as shown by an arrow in FIG. 7, a dustproof plate 22, a communication hole 12A of the second partition plate 12, a dust separating chamber 24 (cleaner housing). It is introduced into the air cleaner 25 from the outside air introduction pipe 26C through the chamber 18).

At this time, the compartment plate 23 has the outside air introducing pipe 26.
Since the path until the outside air is introduced into C is extended and the outside air is made to flow downward once and then upward, large dust, sand, etc. are dropped into the dust separation chamber 24 and separated from the air. You can And the outside air introduction pipe 2
The amount of dust sucked into the air cleaner 25 from 6C is reduced, and the air purified through the air cleaner 25 is supplied to the engine 19. This can prevent the filter element 27 of the air cleaner 25 from being soiled early even when used in a work environment with a relatively large amount of dust.

Further, a case where the hydraulic excavator is used in a work environment such as a desert where there is a large amount of dust will be described.

In this case, as shown in FIGS. 8 and 9,
After removing the cover plate 9B provided on the upper surface cover 9, the support band 28 is loosened, and the air cleaner 25 is attached to the position where the outer air introducing pipe 26C faces upward. The pre-cleaner 30 is connected to the tip of the communicating hole 9A of No. 9 by projecting to the outside. As a result, even when used in a work environment with a large amount of dust, the pre-cleaner 30 removes dust, sand, etc. before introducing the outside air into the air cleaner 25.
It is possible to prevent the filter element 27 from being soiled early.

As described above, in the present embodiment, the outside air introduction pipe 26C selects the above-mentioned three positions by changing the circumferential position of the air cleaner 25 by loosening the support band 28. Outside air introduction tube 2
When 6C is directed to the lateral side, the outside air can be directly introduced into the air cleaner 25 from the outside air introduction chamber 17 and applied to the average working environment.

Further, the outside air introducing pipe 26 of the air cleaner 25
C is directed downward, and the outside air introduction pipe 26C is connected to the dust separation chamber 24
It is possible to easily apply it to a work environment with a relatively large amount of dust by opening it at.

Further, the outside air introducing pipe 26C is directed upward by the support band 28 so that the outside air introducing pipe 26C is placed in the machine chamber 15
It can be easily applied to a work environment such as a desert where there is much dust by connecting the precleaner 30 to the tip of the outside air introducing pipe 26C.

As a result, even one air cleaner 25 can be used in various working environments, and the cost can be greatly reduced as compared with the prior art in which the intake side of the engine is assembled for each working environment. Can be achieved.

In addition, the direction of the outside air introducing pipe 26C radially protruding from the air cleaner 25 can be adjusted to various working environments by a simple work of loosening the support band 28 and changing the circumferential position of the air cleaner 25. The work time and work amount can be greatly reduced.

In the embodiment, the air cleaner 25
In order to change the position of the outside air introduction pipe 26C, the support band 28 as shown in FIG. 5 was used, but the present invention is not limited to this, and the mounting bracket 28A is fixed to the side surface of the casing 26 at every 90 degrees, It goes without saying that the mounting bracket 28A may be directly fixed to the third partition plate 13 with bolts and nuts 29.

Further, in the embodiment, the air cleaner 25
Although the case of forming a cylindrical container (cylindrical container with a bottom) has been described, the invention is not limited to this and may be a rectangular cylinder. Furthermore, although the support band 28 is described as being fixed to the third partition plate 13, the support band 28 may be fixed to the top cover 9.

Further, in the embodiments, the hydraulic excavator has been described as an example, but the present invention is not limited to this, and may be applied to other construction machines equipped with an engine such as a hydraulic crane, a wheel loader, or a bulltozer. May also be applied.

[0046]

As described above in detail, according to the invention of claim 1, an air cleaner is movably attached to the tip of the intake pipe in the circumferential direction, and an outside air introduction port is projectingly provided on the peripheral wall of the air cleaner. Since it is configured to select the position of the outside air introduction port by changing the circumferential position of the air cleaner, it is possible to open the outside air introduction port in different spaces at the selected position of the outside air introduction port, It is possible to realize intake of the engine adapted to various work environments, from a work environment with a relatively small amount of dust to a work environment with a large amount of dust.

Further, in the invention of claim 2, the outside air introduction port of the air cleaner is opened in the machine chamber, in a dust separation chamber defined separately in the machine chamber, and additionally protruded from the building cover to the outside. It is configured to select three positions where the air cleaner is attached. With this, even with one air cleaner, by selecting one of the three mounting positions, it is possible to cope with a work environment with a relatively small amount of dust, a work environment with a relatively large amount of dust, and a work environment that is very covered like a desert. It is possible to realize intake of the engine according to each work environment. Moreover, the work for adapting to the work environment can be performed by a simple work of changing the circumferential position of the air cleaner, and the work time and work amount can be greatly reduced as compared with the conventional technique.

According to the third aspect of the invention, the air cleaner is formed as a cylindrical container having the outside air introduction port protruding in the radial direction, and the frame or the building cover is provided with the supporting member for supporting the peripheral wall of the air cleaner. Therefore, the intake of the engine corresponding to various working environments can be realized by the simple work of loosening the support member and changing the position of the outside air introduction port of the air cleaner.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of a state in which the outside air introducing pipe of the air cleaner is attached to the lateral side, as viewed in the direction of arrows II-II in FIG.

3 is a cross-sectional view as seen from the direction of arrows III-III in FIG.

FIG. 4 is an exploded perspective view showing an air cleaner used in the embodiment.

FIG. 5 is a front view showing a state in which a support band is attached to a third partition plate.

FIG. 6 is a cross-sectional view showing a state where the outside air introduction pipe of the air cleaner is attached to the lower side, as viewed from the same position as in FIG.

7 is a cross-sectional view as seen from the direction of arrows VII-VII in FIG.

FIG. 8 is a view showing a state in which the outside air introducing pipe of the air cleaner is attached to the upper side and the pre-cleaner is connected to the outside air introducing pipe.
It is sectional drawing seen from the same position as.

9 is a cross-sectional view as seen from the arrow IX-IX direction in FIG.

[Explanation of symbols]

3 swivel frames 5 building cover 15 Machine room 16 engine room 17 Outside air introduction room 18 Cleaner chamber 19 engine 20 intake pipe 24 Dust separation chamber 25 air cleaner 26 Casing 26C Outside air inlet pipe (outside air inlet) 28 Support band (support member) 30 Pre-cleaner (additional air cleaner)

Claims (3)

[Claims] 1. A frame, a building cover provided on the frame to define a machine room, an engine provided in the building cover, and an intake provided on the intake side of the engine provided in the building cover. In a construction machine provided with an air cleaner connected via a pipe, an air cleaner is movably attached to a front end of the intake pipe in a circumferential direction, and an outside air introduction port is provided on a peripheral wall of the air cleaner so as to project from the intake pipe. A construction machine characterized in that the position of the outside air introduction port is selected by changing the circumferential position of the air cleaner. 2. A frame, a building cover provided on the frame to define a machine room, an engine provided in the building cover, and an intake provided on the intake side of the engine provided in the building cover. In a construction machine provided with an air cleaner connected via a pipe, an outside air introduction port of the air cleaner is opened at a position opened in the machine chamber and a dust separation chamber defined separately in the machine chamber. A construction machine characterized in that a position and a position where the additional air cleaner is attached to the outside of the building cover and is projected to the outside are selected. 3. The air cleaner is formed as a cylindrical container provided with the outside air introduction port projecting in a radial direction,
A supporting member for supporting a peripheral wall of the air cleaner is provided on the frame or the building cover.
Or the construction machine according to 2.