JPH1182055A - Engine room cover for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the replacement of a filter member placed over openings made in an engine-room cover member as air vents according to its application and the like and facilitate the attachment of the filter member even to the curved portion of the cover member. SOLUTION: A hinged cover 20 that serves as one sidewall of a construction- machine engine room is formed with a plurality of openings 21 over its flat portion 20a and curved portion 20b, one opening 21a out of which openings is made in the curved portion 20b. All these openings 21 and 21a are covered with one filter member 22, over which a frame 23 constituted of a vertical frame part 23a and a horizontal frame part 23b joined together is placed and fixed to the cover 20 by means of fasteners or bolts 27 and nuts 28 to thereby fix the filter member 22 detachably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine room cover provided on an upper revolving structure of a construction machine, and more particularly to a construction machine having a cover member having a flow passage for circulating outside air in an engine room. It concerns the engine room cover.

[0002]

2. Description of the Related Art As a construction machine, for example, a hydraulic shovel generally has a configuration shown in FIG. In the drawing, reference numeral 1 denotes a lower traveling body composed of a crawler traveling body, and an upper revolving superstructure 3 is installed on the lower traveling body 1 via a revolving device 2. Upper revolving unit 3 is revolving frame 3
a front working mechanism 4 and a driver's cab 5 are installed on the revolving frame 3a. Front work mechanism 4
Has a boom 4a which is connected to the revolving frame 3a so as to be capable of raising and lowering, and an arm 4b which is connected to the tip of the boom 4a so as to be vertically rotatable. The front end of the arm 4b serves as a front attachment. For example, bucket 4c
Are rotatably connected.

A portion behind the upper swing body 3 is a machine room 6. Inside the machine room 6 is an engine and hydraulic pump,
Further, various devices such as a valve unit are installed. FIG. 8 shows an internal structure of an engine room that forms a part of the machine room 6. As is clear from the figure, the engine room 7 has a space surrounded by the cover members 8, 9, 10 and the like. In the engine room 7, an engine 11 and a hydraulic pump 12 are mounted. Also, the engine 11
Is provided with a radiator 13. A fan 14 is provided so as to face the radiator 13, and a filter 15 is mounted on the suction side of the radiator 13. Further, an oil cooler may be provided at a position in front of the radiator 13.

The fan 14 is for flowing cooling air to the radiator 13. To form the flow of the cooling air, an outside air intake 16 is formed in the left cover member 8 in the drawing. An air outlet 17 is formed in the upper cover member 9 and the revolving frame 3a. These outside air intake 16 and air exhaust 17
When the fan 14 is operated, an air flow in the direction indicated by the arrow in FIG. 8 is formed, and the cooling air taken in from outside air is brought into contact with the radiator 13 so that the radiator 13 The engine cooling water flowing inside is cooled.

FIG. 9 shows a specific configuration of the outside air intake 16. As is clear from this figure, a large opening 18 is formed in the cover member 8, and this opening 1
8, a perforated plate 19 having a number of punched holes 19a formed in a metal plate is fixed by welding means. The perforated plate 19
When taking in outside air, trap floating materials such as leaves, paper, and vinyl sheets floating around the work site,
The purpose is to prevent the engine room 7 from entering. Therefore, the perforated plate 19 performs a filter function to prevent the suction filter 15 of the radiator 13 from being clogged. Also, although not required,
In some cases, not only the outside air inlet 15 but also the air outlet 16 side may be provided with a perforated plate exhibiting a similar filter function.

[0006]

A hydraulic excavator is generally used to perform work such as excavation of earth and sand at a civil engineering and construction site.
Including the cover members 8 to 10 constituting the engine room 7, there is a possibility that rocks, concrete pieces and other massive objects, structures, and reinforcing bars projecting from the structures may collide. In consideration of the above points, the cover members 8 to 10 and the like, which are installed on the upper swing body 3, are as strong as possible in order to prevent deformation or damage due to collision with them. . Therefore, the perforated plate 19 attached to the air inlet 15 of the cover member 8 is formed of a metal plate having a predetermined thickness, and the perforated plate 19 is firmly fixed to the cover member 8 by welding. As described above, the hydraulic excavator is originally a machine that performs work such as excavation of earth and sand at civil engineering and construction sites, and accordingly, specifications, for example, strength design are made.

By the way, the work function of a hydraulic excavator is not limited to only work on civil engineering and construction sites such as excavation of earth and sand, but there is a possibility that it can be used in various fields. There is a tendency to expand the range of application. For example, a hydraulic excavator is used for cargo handling work on a ship, and this is a specific example thereof. In other words, the operation of unloading chip-like objects and lump materials loaded in the hold, and further powders and storing them in containers and other containers is the work of excavating earth and sand and loading them on a dump truck. There is no particular difference, so that the hydraulic excavator can be used as it is as a machine for unloading work.

In the above-mentioned cargo handling work, for example, in order to unload wood chips as a papermaking raw material using a hydraulic shovel, the bucket 4c constituting the front working mechanism 4 is operated to take out the wood chips from the hold. And transfer it to a container. This work is not particularly different from earth and sand excavation, but the working environment is significantly different between civil engineering and construction sites and the hold. That is, when taking out a wood chip, fine fibers are separated from the chip and scattered and floated around. In the case of a general hydraulic excavator, a perforated plate which is attached to an outside air intake for taking in outside air into an engine room and exerts a filter function is a floating material, such as leaves, paper, a vinyl sheet, and other sheet-like materials. Although it has a function of preventing a certain large thing such as the like from entering, it cannot catch such fine fibers. For this reason, when performing operations such as unloading wood chips, a large amount of fiber enters the engine room together with the outside air due to the rotation of the fan, so that the fiber adheres to the filter provided in the suction part of the radiator and Clogging occurs and cooling water cannot be cooled smoothly. For this reason, the filter must be repeatedly and frequently cleaned, which is extremely troublesome.

In a working environment such as unloading of wood chips, since there is no possibility that solid masses such as rocks will collide with the cover member, a thick metal plate is used as a filter member provided in the air intake. If it is formed of a perforated plate and this perforated plate is not fixed by welding means, the strength cannot be maintained. Rather, the filter must be able to capture finer suspended matter, even though it is somewhat fragile. As described above, depending on the environment in which the hydraulic excavator is operated, as a filter member mounted on the air intake port or the like, in addition to securing a required amount of ventilation, any suspended matter exists around the filter member. Therefore, it is preferable that the setting can be made by comprehensively considering what should be captured and how much strength is required. However, in the prior art, the perforated plate as a filter member attached to the air circulation portion is fixed to the cover member by welding means, and has a structure that cannot be replaced. At present, this point is an obstacle to the expansion of applications of the hydraulic excavator.

[0010] In recent years, aesthetic appearance has been pursued even in construction machines.
There is a tendency that a cover member constituting an engine room has a rounded shape. Since the perforated plate fixed to the opening by welding means is formed of a strong metal plate, it can be easily attached to a flat part of the cover member, but it can be attached to a curved part. , The perforated plate must have a curved surface shape that exactly matches the curved surface of the cover member,
Since the perforated plate has a considerably large area, it is extremely difficult to form a perforated plate having a curved shape that can completely adhere to the curved portion of the cover member, and it is therefore difficult to use this curved portion as an outside air intake. There is also a problem that it is.

The present invention has been made in view of the above points, and an object of the present invention is to provide a filter member mounted on an air circulation section formed in an engine room, according to a use purpose or the like. An object of the present invention is to make it possible to easily replace and mount the device, and to easily mount the device on a curved surface.

[0012]

In order to achieve the above-mentioned object, the present invention is provided on an upper rotating body of a construction machine,
An opening is formed in a cover member that defines an engine room in which an engine is mounted, and the opening is used as an air flow passage in the engine room. The opening is mounted so as to cover the opening of the cover member. A filter member,
A frame member for clamping the filter member between the cover member and a fastening means for detachably fastening the frame member to the cover member is provided. is there.

As the filter member to be mounted on the cover member, it is preferable to use a perforated plate if strength is given priority.
On the other hand, in the case where importance is placed on the function as a filter that captures suspended matter and the like, fine nets such as a plain woven wire mesh and a rhombus wire mesh, and other nets are suitable. Also, expanded metal can be used. In consideration of the case where a filter member having inferior strength is used, in order to make the strength as good as possible, a plurality of relatively small openings are provided in the cover member. However, if the filter member is formed by one sheet, the one filter is sandwiched between the frame member and the cover member, and is fastened by fastening means such as bolts and nuts. The filter member can be easily mounted.

In the case where the cover member has a shape in which a curved surface portion is continuously provided on the upper end side of the flat portion, not only the flat portion but also a plurality of openings including the curved surface portion are formed. . The frame member is made of an elastic metal member, and includes a vertical frame portion extending vertically to the left and right of the opening, and a horizontal frame portion extending between the vertical frame portions at a plurality of locations. The vertical frame portion and the horizontal frame portion are joined and fixed to each other to form an integral frame member. When the opening is also formed in the curved surface portion of the cover member, the vertical frame portion has a curved shape along the curved surface portion of the cover member.
Thereby, the air circulation part can be formed in a wide part including the curved surface part. As described above, when a wire member, a net, or expanded metal is used when attaching a filter member to a curved surface portion, it is not particularly difficult to follow the curved surface. In order to make the contact with the cover member, a thin elastic metal may be used. In addition, the vertical frame portion of the frame member may have a curved shape that conforms to the curved shape of the cover member in advance, or the vertical frame portion may be formed of a member having a high elasticity. It may be configured to be elastically deformed.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. Here, in the drawing,
FIG. 1 is an external view of a main part of a hydraulic shovel shown as an example of a construction machine. FIG. 2 is a view of a cover member viewed from the inside.
FIG. 4 is an exploded perspective view of a filter mechanism detachably mounted on an air circulation portion provided on the cover member. FIG. 4 is a view showing an example of a configuration of fastening means for detachably mounting the filter mechanism on the cover member. 5 and 6 show specific examples of different filter members. In the following description, a hydraulic shovel is illustrated as a construction machine, but the present invention can be applied to construction machines other than the hydraulic shovel, and the shape of the cover member and the shape of the opening are limited to those shown in the drawings. Instead, various fastening members other than those shown in FIG. 4 can be used. Furthermore, although two types of filter members have been exemplified, other than these, various types of members such as a wire mesh, a net, and a perforated plate can also be used.

The overall configuration of the hydraulic shovel is not particularly different from that of the prior art described above.
Members that are the same as or equivalent to the configuration of the related art are given the same reference numerals, and descriptions thereof are omitted. First, in FIG. 1, reference numeral 20 denotes an opening / closing cover.
The cover member is one of a plurality of cover members that define the engine room 7 provided in a, and constitutes a side wall of the engine room 7 and can be opened and closed for maintenance or the like. The opening / closing cover 20 has a shape in which a curved surface portion 20b is continuously provided at an upper end portion of a vertical flat surface portion 20a.

A plurality of openings 21 are formed in the opening / closing cover 20 from the flat surface portion 20a to the curved surface portion 20b, and one opening 21a of the plurality of openings 21 is formed.
Is formed at the curved surface portion 20b. Each of the openings 21 and 21a functions as an intake of outside air into the engine room 7, and by introducing outside air into the engine room 7, cooling air can be supplied to the radiator 13. Although not shown, an air outlet for discharging air in the engine room 7 is formed in a cover or the like on the upper surface. The air outlet may have a shape different from those of the openings 21 and 21a, but may have a shape similar to those.

As apparent from FIGS. 2 and 3, the filter member 22 is mounted so as to cover the openings 21 and 21a. The filter member 22 is formed of a single member capable of covering all of the openings 21 and 21 a in the opening / closing cover 20, and is mounted so as to contact the inner surface of the opening / closing cover 20. And this filter member 22
The frame 23 is attached to fix the frame. The frame 23 is provided with openings 21 and 21a in the opening / closing cover 20.
The filter member 22 is fixed between the wall surface of the opening and closing cover 20 and the frame 23 so that the filter member 22 is fixed. The frame 23 is made of an elastic metal and is formed in a belt shape having a predetermined thickness. Frame 23
Are a vertical frame portion 23a extending vertically in the opening / closing cover 20 and a horizontal frame portion 2 extending horizontally.
3b, and the upper end side of the vertical frame 23a is curved so as to substantially follow the curved shape of the curved surface portion 20b of the opening / closing cover 20. The horizontal frame portion 23b is provided between the vertical frame portions 23a and 23a. The horizontal frame portion 23b is located at a position avoiding the openings 21 and 21a formed in the open / close cover 20 and has a wall surface. To come into contact with. The ends of the vertical frame 23a and the horizontal frame 23b are connected to each other and fixed by welding means or the like to maintain the shape of the frame 23 as an integral body shown in FIG.

After the filter member 22 is brought into contact with the inner surface of the cover 20, the frame 23 is brought into contact with the filter member 22, and the frame 23 is fixed to the cover 20 by fastening means. Then, the filter member 22 has a function of capturing suspended matter and the like conveyed to the outside air sucked from the openings 21 and 21a, and has a function of preventing the matter from entering the engine room 7. In order to firmly fix the filter member 22 by the frame 23, the opening / closing cover 2
A large number of bolt insertion holes 25 and 26 are formed in the frame 0 and the frame 23 at substantially constant intervals. The bolt 27 is inserted through the bolt insertion holes 25 and 26, and the nut 28 is screwed into the bolt 27.
The filter member 22 and the frame 23 are fixed to zero. Therefore, the bolt 27 and the nut 28 constitute a fastening member.

FIG. 4 shows an example of a specific configuration of the fastening member.
Shown in The bolt 27 is inserted into the bolt insertion hole 25 from the outside of the opening / closing cover 20, penetrates the filter member 22, is led out from the bolt insertion hole 26 of the frame 23, and extends to the inner surface side of the opening / closing cover 20. , Nut 28
Screw. In order to smoothly insert the bolt 27 into the filter member 22, a predetermined number of through holes 29 are formed in the filter member 22 at required positions. In order to press the filter member 22 against the inner surface of the opening / closing cover 20, an annular shim 30 is interposed between the filter member 22 and the frame 23 and an annular holding member for pressing the frame 23. A plate 31 is provided. Further, a washer 32 and a washer 33 are mounted on the holding plate 31 so as to be sequentially overlapped.

When the nut 28 is tightened, the tightening force is transmitted to the pressing plate 31 via the washer 33 and the washer 32, and the pressing force acts on the frame 23 by the pressing plate 31. In addition, the pressing force acting on the frame 23 causes the shim 30 to press the filter member 22 against the opening / closing cover 20, thereby fixing the filter member 22 and the frame 23. Therefore, by increasing the areas of the holding plate 31 and the shim 30 to some extent, the opening / closing cover 2 of the filter member 22 and the frame 23 can be opened.
The pressing force to zero can be increased, and they can be stably held. Further, since the filter member 22 is fixed by the tightening force of the bolt 27, even if the curvature of the curved surface portion 20 b of the opening / closing cover 20 does not exactly match the curvature of the vertical frame portion 23 a of the frame 23, The frame 23a is opened and closed by the elastic force.
Thus, the filter member 22 does not partly rise from the opening / closing cover 20. As a result, the curved surface portion 2 of the opening / closing cover 20
The portion 0b can also be used as an air circulating portion, and the flow area of the air circulating portion is increased, so that the cooling efficiency of the cooling water in the radiator 13 can be improved.

As the filter member 22, a perforated plate similar to that described in the related art can be used, but a plain woven wire mesh 40 shown in FIG. 5 or an expanded metal 41 shown in FIG. 6 can also be used. . In particular, if the mesh size defined by the wire diameter and the number of wires per unit area of the wire constituting the plain woven wire mesh 40 is set to an appropriate value using the plain woven wire mesh 40, it is possible to capture an extremely small floating substance. become. On the other hand, although the expanded metal 41 is superior in strength to the plain woven wire mesh 40, the function as a filter may be inferior because the mesh cannot be made fine like the plain woven wire mesh 40. Further, other than these, various nets and wire nets can be used as the filter member 22. The material of the filter member 22 may be not only a metal but also a resin filter member.

As described above, since the filter member 22 can be removably attached to the opening / closing cover 20 by the frame 23, a filter having an appropriate structure can be selected and used according to the purpose of use and the working environment. . For example, when working in an environment where fine suspended matter is present, such as unloading of wood chips, a small woven wire mesh 40 having a small mesh size is used to remove fine suspended matter, such as civil engineering and construction sites. If the request for strength is higher than to capture,
A perforated plate is used as the filter member 23. Furthermore, when a certain strength is required, the filter function is not good, and a large amount of air is required, the expanded metal 41 can be used.

The opening 2 formed in the opening / closing cover 20
The strength of the filter member 22 can be improved by forming as many as possible 1 and 21a into small sections. Moreover, the filter member 22 is provided with the openings 21 and 21.
Since the whole is formed by one member instead of being provided for each a, even if a large number of openings 21 and 21a are formed, the mounting is not so troublesome. Moreover,
The openings 21 and 21a formed in the small sections are completely surrounded by the frame 23.
Since the required number of fastening means including the nuts 28 are provided, the filter member 22 can be stably mounted with a predetermined tension applied thereto, and even if a massive object collides,
Significant strength can be maintained. Further, when the filter member 22 is damaged or extremely dirty, the filter member 22 can be easily replaced by attaching and detaching the bolts 27 and nuts 28 constituting the fastening means.

[0025]

As described above, according to the present invention, the filter member which is formed in the cover member and which is attached to the opening functioning as the air passage is detachably fixed by the frame member. According to the present invention, the members can be easily replaced and mounted according to the purpose of use, and the filter member can be easily mounted on the curved surface of the cover member.

[Brief description of the drawings]

FIG. 1 is an external view of a main part of a hydraulic shovel as an example of a construction machine having an engine room cover according to an embodiment of the present invention.

FIG. 2 is a view of the opening / closing cover as viewed from an inner surface side.

FIG. 3 is an exploded perspective view showing a structure for attaching a filter member to an opening / closing cover.

FIG. 4 is a cross-sectional view showing the configuration of the fastening means.

FIG. 5 is a plan view of a plain woven wire mesh as an example of a filter member.

FIG. 6 is a plan view of an expanded metal as another example of the filter member.

FIG. 7 is an external view of a hydraulic shovel as an example of a construction machine.

FIG. 8 is an explanatory diagram of a configuration of an engine room.

FIG. 9 is an external view illustrating a configuration of a filter member according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower light transmitting body 3 Upper revolving body 6 Machine room 7 Engine room 11 Engine 13 Radiator 14 Fan 20 Opening / closing cover 21, 21a Opening 22 Filter member 23 Frame 23a Vertical frame part 23b Horizontal frame part 27 Bolt 28 Nut 30 Shim 31 Presser plate 40 Plain weave wire mesh 41 Expanded metal

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16M 1/00 F16M 1/00 G

Claims (5)

[Claims] An opening is formed in a cover member provided in an upper revolving structure of a construction machine and defining an engine room in which an engine is mounted, and the opening is used as an air flow passage in the engine room. A filter member mounted so as to cover an opening of the cover member, a frame member for clamping the filter member between the cover member, and a frame member detachably fixed to the cover member. An engine room cover for a construction machine, wherein the engine room cover includes a fastening means for attaching. 2. The engine room cover for a construction machine according to claim 1, wherein the filter member is one of a wire mesh, a net, an expanded metal, and a perforated plate. 3. The construction according to claim 1, wherein said opening is provided in said cover member at a plurality of divided portions, and said filter member is formed to have a size to cover all of said openings. Machine engine room cover. 4. The cover member has a curved portion continuously formed on an upper end side of a flat portion, the opening is formed at a plurality of portions including the curved portion, and the frame member is formed of an elastic metal member. A vertical frame portion extending to the left and right of the opening and extending in the vertical direction, and a plurality of horizontal frame portions provided so as to span between the two vertical frame portions; The vertical frame portion is formed in a curved shape along a curved surface portion of the cover member, wherein the end portions of the portion are joined and fixed to each other. Engine room cover for construction machinery. 5. The engine room cover for a construction machine according to claim 1, wherein the fastening means for fixing the frame member to the cover member is constituted by a bolt and a nut.