JP2875730B2 - Machine room closed 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 sealing structure for a machine room, and more particularly to a sealing structure suitable for a machine room mounted on a construction machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art FIG. 6 shows the appearance of a conventionally known hydraulic excavator. In this figure, reference numeral 1 denotes a traveling body, and 2 denotes a revolving body. On the revolving body 2, an operator's cab 3, a machine room 4, and a counterweight 5 are mounted. Also, at the front portion of the revolving superstructure 2, a base end portion of a front member including a boom 6, an arm 7 pin-connected to the tip of the boom 6, and a bucket 8 pin-connected to the tip of the arm 7 Are pin-connected. The machine room 4 includes the revolving superstructure 2, a counterweight 5, a cover member 9 having a window formed on a side surface, and a door member 10 for opening and closing the window formed in the cover 9.

FIG. 7 shows an arrangement of each device mounted on the revolving superstructure 2. As shown in FIG.
Is composed of a radiator chamber 11, a pump chamber 12, an engine chamber 13, a fuel tank 14, an oil tank 15, and a tool box 16, and the door member 10 is provided with a side surface of the radiator chamber 11, It is attached to the side of the pump chamber 12. As shown schematically in FIG. 7, the door member 10 has one end hinged to the cover member 9, and turns around the hinge 17 in the direction of arrow A or B.

FIG. 8 shows a lock mechanism of the door member 10 and a soundproof mechanism of the machine room 4. In this figure, 21 is a column standing on the revolving structure 2, 22 is a locking piece mounted on the column 21, 23 is a lock member mounted on the inner surface of the door member 10, and 24 is an outer surface of the door member 10. The release lever 25 of the lock member 23 disposed at a position 25 is a sound absorbing material such as urethane foam provided at a portion facing the support 21 on the inner surface of the door member 10, and 26 is the counterweight 5.
2 also shows a sound absorbing material such as urethane foam provided in a portion of the inner surface facing the column 21. Sound absorbing material 25
Closes the door member 10 and locks the locking member 23 with the locking piece 22.
Is formed in advance so as to be compressed by an appropriate amount between the door member 10 and the support column 21 when the engaging claw 23a is engaged. On the other hand, the sound absorbing material 26 is a counterweight 5
It is formed in a thickness such that it is compressed by an appropriate amount between the support 21 and the support 21.

[0005] The hydraulic excavator having the above-described structure includes a door member 10.
Since the sound absorbing material 25 is provided between the support member 21 and the support 21, noise caused by the vibration of the door member 10 can be reduced.
Since the sound absorbing material 26 is interposed between the counterweight 5 and the support 21, noise leakage from the machine room 4 can be reduced.

[0006]

However, since the counterweight 5 is a long member, as shown in FIG.
Is slightly displaced, the mounting positions of the both ends with respect to the column 21 greatly vary. For this reason, at the end shifted in the direction away from the planned mounting position, as shown in an enlarged view in FIG.
A gap 27 is likely to be formed between the support 6 and the support 21.
7, there is a disadvantage that noise easily leaks to the outside as indicated by an arrow C. In addition, if the mounting position of the counterweight 5 is strictly adjusted, such inconvenience can be prevented beforehand, but it is practically very difficult to strictly adjust the mounting position of the heavy counterweight 5. ,
The assembly efficiency of the hydraulic excavator is significantly reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a soundproof mechanism capable of effectively preventing noise from leaking without lowering the assembly efficiency of a hydraulic shovel. .

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a method in which a machine mounted on a revolving structure is provided with a counterweight detachably attached to a rear side of the revolving structure and a window on a side surface. Cover with a cover member with a hole,
A machine room that opens and closes a window hole formed in the cover member with a door member having one end hinged to the cover member and the other end locked to a support standing on the revolving structure. In the closing structure, a sound absorbing material having elasticity is attached to a tip end of the support, and the sound absorbing material can be approached or separated from at least the counterweight of the door member and the counterweight. The sound absorbing member is attached to the door member and the counterweight so that the sound absorbing member is elastically contacted with the door member and the counterweight.

[0009]

When the sound absorbing material attached to the soundproof member is configured to be able to approach or separate from the door member and the counterweight, even if the mounting position of the door member and the counterweight deviates from the expected mounting position, the soundproofing is achieved. Within the adjustable range of the members, the sound-absorbing material can be reliably brought into contact with these door members and the counterweights, so that the mounting accuracy of the door members and the counterweights does not need to be as high as required for the function. Thus, a predetermined soundproofing effect can be obtained. In particular, it is difficult to strictly control the mounting position of the counterweight due to its configuration. Therefore, if at least the sound absorbing material is configured to be able to approach or separate from the counterweight, it is effective in reducing noise. .

[0010]

【Example】

<First Embodiment> FIGS. 1 and 2 show a closed structure of a machine room according to a first embodiment. FIG. 1 is a partially sectional plan view of the sealing structure according to the present embodiment, and FIG. 2 is a side view as seen from the XX direction in FIG. In these figures, 31 is a sound-absorbing member base, 32 and 33 are sound-absorbing material fittings attached to the tip of the base 31, and 34 and 35 are sound-absorbing materials fixed to the outer surfaces of the sound absorbing material fittings 32 and 33, respectively. , 36 are mounting bolts, 37 is a nut screwed to the mounting bolt, and other portions corresponding to those in FIGS. 4 and 5 are denoted by the same reference numerals.

As is clear from FIGS. 1 and 2, the substrate 3
Reference numeral 1 denotes a so-called angle member having a hook-shaped cross-section, and its upper portion is curved inward with substantially the same curvature as the door member 10. A plurality of circular holes 38 are formed at predetermined intervals on the base mounting surface of the support 21, and the circular holes 38 are formed on the support mounting surface of the base 31.
A plurality of long holes 3 extending in the width direction
9 have been established.

The front end of each surface constituting the base 31 has an elastic sound absorbing material 3 from its upper end to its lower end.
4 and 35 are continuously fixed via attachments 32 and 33. In this embodiment, rubber or flexible plastic hollow bodies are used as the sound absorbing members 34 and 35.

In the base 31, each of the holes 38 formed in the support mounting surface of the support column 21 matches with each of the circular holes 38 formed in the support mounting surface of the support column 21. The mounting bolt 36 penetrates each of the long holes 39, and the nut 37 is screwed into the mounting bolt 36, whereby the mounting bolt 36 is mounted on the support column 21. In this case, by shifting the position where each circular hole 38 and each long hole 39 coincide with each other back and forth, the sound absorbing material 34
Can be adjusted. Further, by interposing a spacer (not shown) between the base mounting surface of the support 21 and the support mounting surface of the base 31, or removing the provided spacer, the sound absorbing material 35 from the support 21 is removed. The protrusion amount can be adjusted.

In the structure for closing the machine room of this embodiment, the amount of projection of the sound absorbing material 34 from the support column 21 can be adjusted, so that the sound absorbing material 34 can be reliably brought into contact with the inner surface of the door member 10. Noise from the vehicle can be reduced. In addition, since the amount of protrusion of the sound absorbing material 35 from the support column 21 can be adjusted, the sound absorbing material 35 can be reliably brought into contact with the inner surface of the counterweight 5, and leakage of noise from the portion can be reduced. In addition, the closed structure of the machine room of the present embodiment uses a rubber or flexible plastic hollow body as the sound absorbing material 34, so that it has a higher elasticity as compared with the case where foamed plastic is used, and the door has a higher elasticity. Even if the member 10 is closed vigorously, the impact force can be absorbed by the sound absorbing material 34 and the door member 10 is less likely to collide with the column 21 or the like, so that the impact sound when the door is closed can be reduced.
Further, when the door is closed, the sound absorbing material 34 can be pressed against the door member 10 with a stronger force, so that the apparent rigidity of the door member 10 can be improved, and abnormal noise such as so-called "chattering sound" can be effectively prevented. can do. Further, the closed structure of the machine room of this example uses a hollow body made of rubber or flexible plastic as the sound absorbing material 35, so that water is not contained in the sound absorbing material as in the case of using foamed plastic. The corrosion of the counterweight 5 and the like can be prevented or reduced.

<Second Embodiment> FIG. 3 shows a closed structure of a machine room according to a second embodiment. In this example, the base 31 of the soundproof member is composed of two members 31a and 31b independent of each other, and a sound absorbing material made of a hollow body of rubber or flexible plastic is provided at an end of each of the members 31a and 31b. 3
4 and 35 are fixed via attachments 32 and 33.
The first member 31a and the second
Circular holes 38a, 38b for mounting the member 31b are formed in parallel, and the first member 31a having an I-shaped cross section corresponds to the circular hole 38a formed on the base mounting surface of the column 21. The elongated hole 39 extending in the width direction
Has been established. On the other hand, in the second member 31b having an L-shaped cross section, a circular hole 40 is formed in a portion corresponding to the circular hole 38b formed in the base mounting surface of the support 21.

The first member 31a is inserted into a circular hole 38a formed on the base mounting surface of the support column 21.
a, each of which corresponds to each of the elongated holes 39,
The mounting bolt 36 penetrates through the 8a and each of the long holes 39, and the nut 37 is screwed into the mounting bolt 36, thereby being mounted on the column 21. In this case, the amount of protrusion of the sound absorbing material 34 from the support column 21 can be adjusted by shifting the position where each circular hole 38a and each long hole 39 coincide with each other. On the other hand, the second member 31b matches each of the holes 40 formed in the second member 31b with the circular hole 38b formed in the base mounting surface of the column 21, and the respective circular holes 38b, The mounting bolt 36 is passed through 40, and a nut 37 is screwed into the mounting bolt 36, whereby the mounting bolt 36 is attached to the column 21. In this case, a spacer (not shown) is provided between the base mounting surface of the column 21 and the column mounting surface of the second member 31b, or the spacer is removed to remove the spacer from the column 21. The protrusion amount of the sound absorbing material 35 can be adjusted. The same effect as in the first embodiment can be obtained by the sealing structure of the present embodiment.

<Third Embodiment> FIG. 4 shows a machine room closing structure according to a third embodiment. In the present embodiment, two members 31 in which the base 31 of the soundproof member is bolted to each other.
c, 31d, and each member 31c, 31d
Sound absorbing members 34 and 35 made of rubber or a flexible plastic hollow body are fixed to the end sides through fittings 32 and 33. The first member 3 is provided on the base mounting surface of the support 21.
A circular hole 38 for mounting 1c is provided. On the other hand, the first member 3 having an L-shaped cross section
In FIG. 1c, an elongated hole 39 extending in the width direction corresponding to the circular hole 38 formed in the base mounting surface of the support 21 is formed in the wide support mounting surface, and a narrow connecting surface is formed in the narrow connecting surface. A plurality of circular holes 41 are opened at predetermined intervals. On the other hand, in the second member 31d having the I-shaped cross section, a long hole 42 extending in the width direction is formed in a portion corresponding to the circular hole 41 formed in the connection surface of the first member 31c. ing.

The first member 31c is inserted into each of the circular holes 38 formed on the base mounting surface of the support column 21.
c, each of the long holes 39 coincides with each other, and each of these circular holes 3
The mounting bolt 36 is inserted through the hole 8 and each of the long holes 39, and the nut 37 is screwed into the mounting bolt 36, whereby the mounting bolt 36 is mounted on the column 21. In this case, the amount of protrusion of the sound absorbing material 34 from the support column 21 can be adjusted by shifting the position where each circular hole 38 and each long hole 39 coincide with each other. On the other hand, the second
Of the first member 31c matches the respective holes 42 formed in the second member 31d with the circular holes 41 formed in the connecting surface of the first member 31c. The first member 31c is attached to the first member 31c by penetrating the attachment bolt 36 through the nut 42 and screwing the nut 37 into the attachment bolt 36. In this case, the amount of protrusion of the sound absorbing material 35 from the column 21 can be adjusted by shifting the position where each circular hole 41 and each long hole 42 coincide with each other back and forth. With the closed structure of this example,
The same effects as in the first embodiment can be obtained.

<Fourth Embodiment> FIG. 5 shows a machine room closing structure according to a fourth embodiment. In this example, the base member 31 of the soundproofing member is formed of an angle member having a hook-shaped cross section, and the support member mounting surface and the other side perpendicular to the pillar mounting surface are interposed through a spring member 43. Sound absorbing material holder 4
4 and 45 are elastically attached to the sound absorbing material holder 4.
Sound absorbing members 32 and 33 made of rubber or a flexible plastic hollow body are fixed to the outer surfaces of the members 4 and 45. Prop 2
A circular hole 38 for mounting the base 31 is formed on one base mounting surface. On the other hand, in the support mounting surface of the base 31, a circular hole 3 formed in the support mounting surface of the support 21 is provided.
A circular hole 46 is opened in a portion corresponding to 8. Although not shown, between the base 31 and each of the sound absorbing material holders 44 and 45, a stopper for the sound absorbing material holders 44 and 45 is provided.

The base 31 matches the respective holes 46 formed in the base 31 with the respective holes 38 formed in the base mounting surface of the column 21, and the mounting bolts 36 are fitted in the respective holes 38, 46. Is attached to the column 21 by screwing a nut 37 into the nut. Sound absorbing material 34, 35
Is brought into contact with the door member 10 and the counterweight 5 by the elastic force of the spring member 43.

According to the sealing structure of this embodiment, the same effect as that of the first embodiment can be obtained, and since the sound absorbing members 34 and 35 are attached to the base 31 via the spring member 43, the support 2
There is an effect that the sound absorbing members 34 and 35 can always contact the door member 10 and the counterweight 5 without adjusting the amount of protrusion of the sound absorbing members 34 and 35 from 1.

The gist of the present invention resides in that at least the sound-absorbing material to be brought into contact with the counterweight is movably attached to the support column. It is not limited to the example. Hereinafter, other embodiments of the present invention will be described.

In each of the above embodiments, the door member 10
The sound absorbing material 34 contacting the counterweight 5 and the sound absorbing material 35 contacting the counterweight 5 are both movably attached to the column 21, but at least only the sound absorbing material 35 contacting the counterweight 5 is attached. , If it is movably attached to the column 21.

In each of the above embodiments, the sound absorbing material 34,
Although a hollow body made of rubber or flexible plastic is used as 35, a solid body made of rubber or flexible plastic can also be used. In addition, the sound absorbing material 34 that is in contact with the door member 10 in which the generation of rust is not a problem because the coating is sufficiently applied is replaced with a hollow or solid body made of rubber or flexible plastic. For example, foamed plastic such as urethane foam can be used.

In the first to third embodiments, the circular hole is formed in the support mounting surface of the support 21 and the elongated hole 38 is formed in the support mounting surface of the support 31.
It is also possible to form an elongated hole in the base mounting surface of the base 31 and to form a circular hole in the support mounting surface of the base 31. Thus, mounting bolt 3
Which of the through holes through which 6 pass is circular and which is a long hole is completely free in terms of design, and both the through holes can be both long holes.

In addition, the shapes of the support 21, the base 31, and the sound absorbing members 34, 35 can be arbitrarily designed without being limited to the above embodiments.

[0027]

As described above, according to the present invention,
Since the sound absorbing material attached to the soundproof member is configured so as to be able to approach or separate from at least the counterweight, even if the mounting position of the counterweight deviates from the expected mounting position, the soundproof member can be adjusted within the adjustable range of the soundproof member. If this is the case, the sound absorbing material can be reliably brought into contact with the counterweight, and a predetermined soundproofing effect can be obtained without increasing the mounting accuracy of the counterweight beyond that required for the function. Further, if the sound absorbing material is configured so as to be able to approach or separate from the door member, the sound absorbing material can be reliably brought into contact with the door member, and the occurrence of abnormal noise can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of an essential part showing a structure for closing a machine room according to a first embodiment.

FIG. 2 is a view in the direction of arrows XX in FIG.

FIG. 3 is a plan view of a main part showing a sealing structure of a machine room according to a second embodiment.

FIG. 4 is a plan view of a main part showing a structure for closing a machine room according to a third embodiment.

FIG. 5 is a plan view of an essential part showing a structure for closing a machine room according to a fourth embodiment.

FIG. 6 is a perspective view of a hydraulic shovel.

FIG. 7 is a plan view of the swing body.

FIG. 8 is a plan view of a main part showing a sealed structure of a machine room according to a conventional example.

FIG. 9 is an enlarged view of a main part of FIG. 8;

[Explanation of symbols]

 Reference Signs List 5 counterweight 10 door member 31 base of soundproofing member 32, 33 sound absorbing material fitting 34, 35 sound absorbing material 36 mounting bolt 37 nut

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-98667 (JP, A) Japanese Utility Model 60-84378 (JP, U) Japanese Utility Model Application 57-185626 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) E02F 9/16 B60K 11/04

Claims (5)

(57) [Claims] 1. A machine mounted on a revolving superstructure is covered with a counterweight detachably attached to a rear side of the revolving superstructure and a cover member having a window opening on a side surface,
A machine room that opens and closes a window hole formed in the cover member with a door member having one end hinged to the cover member and the other end locked to a support standing on the revolving structure. In the closing structure, a sound absorbing material having elasticity is attached to a tip end of the support, and the sound absorbing material can be approached or separated from at least the counterweight of the door member and the counterweight. A soundproof member attached to the door member and the door member and the counterweight are elastically contacted with each other. 2. The base according to claim 1, wherein the soundproof member is formed of an angle material having a hook-shaped cross-section and a slot extending in the width direction of the support mounting surface, and the base is formed. A sound-absorbing material fixture fixed along an end of each of the surfaces and a sound-absorbing material fixed to an outer surface of the fixture. 3. The soundproofing member according to claim 1, wherein the soundproofing member has an L-shaped cross section, a wide pole mounting surface is provided with an elongated hole extending in the width direction thereof, and another narrow surface is circular. A base made of an angled material having a hole formed therein, a long hole formed at a position corresponding to the circular hole, and a plate-shaped body integrated with the base by a bolt penetrating these circular hole and the long hole; A sound absorbing material fixing tool fixed along an end of a wide support mounting surface and an end of the plate-like body constituting the base; and the sound absorbing material fixed to an outer surface of the fixing tool. A closed structure of a machine room cover, which is used. 4. The base according to claim 1, wherein the soundproof member is formed of an angle material having a hook-shaped cross section and a circular hole formed in a support mounting surface, and an end of each surface constituting the base. A structure for closing a machine room cover, comprising a sound absorbing material mounting member elastically held on a side and the sound absorbing material fixed to the mounting device. 5. The sound absorbing material according to claim 1, wherein
A closed structure for a machine room cover, wherein a hollow or solid body made of rubber or flexible plastic is used.