JP3038506B2 - Soundproof engine working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof engine working machine in which a working machine such as an engine and a generator, a welding machine or a compressor are covered with a box-shaped soundproof case.

[0002]

2. Description of the Related Art In a soundproof engine working machine in which an engine and a working machine are covered with a soundproof case, not only the noise, which is the original purpose of the soundproof case, but also the heat balance in the soundproof case is taken into consideration. Thus, for example, it is necessary to prevent the heat radiation from the high-temperature exhaust silencing muffler from being transmitted to the engine body or the working machine. As means for improving such a heat balance, conventionally, for example, Japanese Utility Model Publication No. 63-47616 or Japanese Utility Model Publication No.
As described in Japanese Unexamined Patent Application Publication No. 2-203939, the inside of the soundproof case is partitioned by something like an intermediate wall to divide it into a muffler room and an engine room, and a muffler is arranged in the muffler room. Attempts have been made to prevent heat radiation from affecting the engine. In this case, only the muffler and the exhaust pipe are arranged in the muffler room, and the engine body and the working machine, and the battery and the fuel tank, which are auxiliary devices of the engine body, are all arranged in the engine room. In the case of a welding machine, its reactor is also arranged in the engine room.

[0003]

However, the above-mentioned conventional soundproof case provided with a muffler chamber has drawbacks that the noise emitted from the engine room cannot be sufficiently reduced and the case itself tends to be large. For example, in the invention of Japanese Utility Model Publication No. 62-35862,
A muffler room is provided above the engine room of the soundproof case,
The fuel tank is located beside the muffler room,
In this case, a dead space is easily generated in the upper part of the working machine, and there is a disadvantage that the case itself becomes large. That is, a working machine such as a generator generally has a lower overall height than the engine body, so that a large space is created between the generator and the side of the engine. However, the fuel tank is rather arranged in this space. Doing so can make the soundproof case itself more compact. On the other hand,
In the structure disclosed in JP-A-203939, the muffler chamber is formed as an independent box-shaped case and is arranged in the engine room. However, in this case, a special case for installing the case-shaped muffler is provided. Therefore, a large space is also required, and further, in order to make the muffler box-shaped, an unnecessary dead space is easily generated in the muffler room itself, and similarly, it is easy to increase the size. And since this muffler room occupies a large space in the engine room, the volume of the engine room becomes relatively small, resulting in an increase in noise. That is, when the volume of the engine room becomes smaller,
The reverberation in the room also increases, and the area of the sound absorbing material attached to the inner wall of the case also decreases, so that the noise increases.

Further, as described above, when the working machine is a welding machine, the reactor is arranged in the engine room. This also results in reducing the volume in the engine room. , The noise is also increasing.

SUMMARY OF THE INVENTION An object of the present invention is to provide a soundproof engine working machine which solves these conventional problems and makes it possible to reduce the noise while reducing the size of the soundproof case.

[0006]

In order to solve the above-mentioned problems, in the first invention of this application, the inside of the soundproof case is partitioned by an intermediate wall into an engine room and a muffler room, and the inside of the engine room is separated. The engine body and the working machine are arranged side by side in the crankshaft direction, and the fuel tanks are respectively arranged above the working machine, and the muffler chamber is recessed, and the intermediate wall is positioned with respect to the muffler chamber. To
And is divided by a ceiling wall and a vertical wall in a direction perpendicular to each other , and
Surrounded by these ceiling and vertical walls and the soundproof case side wall
An enlarged engine room is formed, and a battery is disposed in the expanded portion to make the muffler room inverted L-shaped .

Furthermore, in the second invention of this application, soundproofing Ke
The interior of the car is separated by a vertical intermediate wall and
Partitioned into muffler room and engine in engine room
Place the main unit, work equipment and fuel tank, and put it inside the muffler room.
An exhaust muffler is arranged, and further, the muffler chamber is recessed.
The ceiling wall and the vertical wall in a direction perpendicular to the intermediate wall
The ceiling and vertical walls, and the
Form the enlarged part of the engine room surrounded by the sound case side wall
At the same time as the mounting base
Place the battery in place, and
Is a duct for taking in cooling air for batteries.
It is characterized by.

[0008]

According to the above construction, first, since the fuel tank is provided above the work machine, the fuel tank is disposed by utilizing the dead space above the work machine, and the space in the engine room is effectively used as a whole. Can be used for The exhaust muffler chamber is recessed, and the battery is disposed in the enlarged engine room formed by the recess. This also makes it possible to effectively use the space in the soundproof case, and Since the volume of the engine room is increased by the enlarged portion, noise can be reduced. In this case, since the duct for taking in the cooling air is provided between the battery mounting base and the case wall in the enlarged portion, heat can be trapped in the enlarged portion and the battery can be prevented from being heated .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 4 showing an embodiment of the present invention, reference numeral 1 denotes a box-shaped soundproof case, and the soundproof case is formed by an intermediate wall 2 arranged in the soundproof case 1 in a vertical direction. The inside of the case 1 is divided into an engine room 3 and a muffler room 4 on the left and right. In the one engine room 3 partitioned on the left and right, an engine body 5 and a generator 6 as a working machine driven by the engine body 5 are installed side by side in the crankshaft direction. Similarly, a fuel tank 7 is arranged above the generator 6 in the engine room 3. Generator 6
A cooling air intake 9 is opened on one side wall 8 in the front-rear direction of the soundproof case 1 on the side in the crankshaft direction so as to face the generator 6. A U-shaped baffle plate 10 is fixed so as to protrude from the side wall 8 so as to protrude from the side wall 8 so as to surround the lower side and the left and right outer sides of the cooling air intake 9 and further cover the baffle plate 10 and the intake 9. Thus, an intake duct 11 having an open lower end is attached. The cooling air flowing upward from the inlet 12 at the lower end of the intake duct 11 rises along the left and right sides of the baffle plate 10 and then flows downward from the open portion on the upper side of the baffle plate 10, An inverted U-shaped cooling air suction passage is formed so as to flow into the intake port 9 side, so that noise in the engine room 3 is not discharged to the outside as much as possible. In the lower part of the cooling air intake 9,
An installation plate 13 is provided so as to straddle between the engine room 3 and the baffle plate 10, and the reactor 14 of the generator 7 projects outward from the engine room 3 on the installation plate 13. It is attached to.

[0010] The cooling air inlet 9 side wall 16 of the soundproof case 1 on the opposite side of the the intake intake duct 1 so as to face the cylinder head 17 of the engine body 5
8 are attached. 19 is the cylinder head 1
7, an air cleaner 20 at the tip of the intake pipe 19 is disposed so as to protrude into the intake intake duct 18.

The intermediate wall 2 is not a plate that simply divides the soundproof case 1 into two parts, but is formed by cutting a lower right corner of the right side of FIG. cage, and Tsu extend over the soundproof case side wall 22 strikes the end portion and the outer wall of the muffler chamber 4 of the cut-out portion
The vertical wall 23 and the ceiling wall 24 in a direction perpendicular to the intermediate wall 2 are connected, whereby the muffler chamber 4 is cut out in a rectangular shape, and the muffler chamber 4 is formed into a substantially inverted L-shape. A battery 26 is installed via an attachment base 27 in the engine room enlarged portion 25 recessed by the notch. As shown in FIG. 4, the mounting base 27 has an L-shaped cross section that straddles the side wall 22 and the bottom wall 28 at the lower end corner in the left-right direction of the soundproof case 1. 28 compartmented space is formed between the engine room 3 between, in this space, and an auxiliary inlet 29 of the cooling air to the bottom wall 28, on the other hand, in the front and rear side of the battery 26, the mounting base 27 Outlets 30 are respectively formed in the upper wall portions of
Cooling air is taken in from the auxiliary inlet 29, and a pair of outlets 3
A duct 31 for taking in auxiliary cooling air from 0 and 30 to the periphery of the battery 26 is formed.

In the muffler chamber 4, a pre-muffler 33 is disposed in the front and rear horizontal direction above the ceiling wall 24 above the battery 26, and extends from the upper wall 34 to the bottom wall 28 of the soundproof case 1. Main muffler 3 in a large space
5 and its main muffler 3
5 is connected to an outlet on the side of the prim muffler 33 by a connecting pipe 36. The exhaust pipe 37 connected to the outlet at the lower end of the main muffler 35 is bent in a key shape and rises upward, and extends upward through a side of the main muffler 35 opposite to the side of the pre-muffler 33. After being issued,
It projects above the upper wall 34 of the soundproof case 1 . On the other hand, the exhaust inlet pipe 38 connected to the inlet side of the pre-muffler 33 is bent in a key shape and extends along the lower side of the pre-muffler 33 to the main muffler 35 side, and then becomes L-shaped. It bends and penetrates the intermediate wall 2, and the engine room 3
To the cylinder head 17 of the engine body 5 inside. On the other hand, a scroll-shaped discharge duct 39 surrounding the cooling fan of the engine body 5 on the side opposite to the generator 6 is connected to the communication wall formed on the ceiling wall 24 of the enlarged portion 25 on the side of the battery 26 of the enlarged portion 25. Mouth 4
0, and the cooling air which has cooled the generator and the engine body 5 is thereby discharged to the scroll-shaped duct 39.
From the muffler chamber 4. The exhaust air that has entered the muffler chamber 4 first flows around the pre-muffler 33 to cool the pre-muffler 33 and cools the main muffler 35, and then forms on the soundproof case side wall 22 surrounding the muffler chamber 4. Many outlets 4
1 is emitted to the outside. The pre-muffler 33 and the main muffler 35 have an elliptical cross section whose width is reduced with respect to the partitioning direction of the intermediate wall so that the width of the soundproof case 1 in this direction can be made as small as possible. The auxiliary cooling air taken in from the auxiliary intake duct 31 is drawn into the passage in the engine main body 5 from the side surface of the engine main body 5 through the periphery of the battery 26, and then from the exhaust duct 39 to the muffler chamber 4 side. Is discharged to

[0013]

As described above, according to the present invention, the fuel tank arranged in the engine room is compactly arranged by utilizing the dead space above the working machine, and a part of the muffler chamber is recessed. The dead space is not generated in the muffler chamber, and the battery is arranged in the enlarged part formed by the recess. Therefore, the space in the soundproof case is effectively used, and the overall structure is compact. Is what I was able to do. Moreover, since the engine room is enlarged by the above-mentioned enlargement part,
The engine room volume increases, and noise can be reduced. Conversely, if such an enlarged portion is not provided, the battery must be disposed closer to the engine room than the intermediate wall. There is a disadvantage that the installation space for the battery must be ensured and the soundproof case is enlarged, which does not have such a disadvantage in the present invention.

In addition, the engine in which the battery is stored
The room enlargement area is located above the ceiling wall, vertical wall and soundproof case side wall.
Face and three sides, one side is the engine
And it is only open to the installation part of the work machine,
It is hardly affected by the heat of the engine and the work equipment.
The service life can be extended. In addition, the battery
By providing a storage space, the muffler room can be
Because it is shaped like a letter, the prima
Multiple, such as a main muffler in the vertical
Muffler can be efficiently arranged. In addition, perpendicular to the intermediate wall
Since only the wall and ceiling wall are provided, the number of wall
It can be reduced and costs can be reduced.

In addition, in the second invention of this application, the battery is installed in the engine room enlarged portion in which the muffler chamber is recessed as described above, and the space between the installation base of the battery and the soundproof case wall is provided. Is a duct for taking in auxiliary cooling air for cooling the battery, so that heat can be prevented from being trapped in this narrow enlarged portion, and the battery can be cooled efficiently. In other words,
A structure that effectively utilizes the space in the soundproof case using such an enlarged portion, but has a structure that does not trap heat can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an exhaust structure of an engine body, a generator, and the like showing an embodiment of the present invention.

FIG. 2 is a side view of the inside of an engine room, showing the soundproof case in a longitudinal section.

FIG. 3 is a plan view of the inside of an engine room, also showing the soundproof case in a cross-section.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Soundproof case 2 Intermediate wall 3 Engine room 4 Muffler room 5 Engine main body 6 Generator 7 Fuel tank 9 Cooling air intake 11 Intake duct 14 Reactor 23 Vertical wall 24 Ceiling wall 25 Engine room expansion part 26 Battery 27 Mounting base 31 Auxiliary cooling Wind intake duct 33 Prim muffler 35 Main muffler

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-60-209634 (JP, A) JP-A-59-22949 (JP, U) JP-A-58-136619 (JP, U) 103562 (JP, U) JP-A 1-125818 (JP, U) JP-A 2-63027 (JP, U) JP-A 63-150038 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F02B 77/13 F02B 63/04

Claims (2)

(57) [Claims] An inside of a soundproof case is partitioned by an intermediate wall into an engine room and a muffler room, and an engine body and a working machine are arranged side by side in a crankshaft direction in the engine room. And the muffler chamber is recessed, and the muffler chamber is partitioned by a ceiling wall and a vertical wall perpendicular to the intermediate wall with respect to the muffler chamber. And these ceiling walls and hanging
Forming an enlarged engine compartment surrounded by a straight wall and the side wall of the soundproof case, and disposing a battery in the enlarged portion ;
The muffler room is formed in an inverted L-shape . 2. The interior of a soundproof case is partitioned by a vertical intermediate wall into an engine room and a muffler room, an engine body, a working machine and a fuel tank are arranged in the engine room, and an exhaust muffler is provided in the muffler room. Arranged, and further, the muffler chamber is recessed so as to be in a direction perpendicular to the intermediate wall.
Partitioned by the ceiling wall and the vertical wall, and, with these ceiling wall
An enlarged portion of the engine room surrounded by the vertical wall and the side wall of the soundproof case is formed, and a battery is disposed in the enlarged portion via a mounting base, and a battery is provided between the mounting base and the case wall. A soundproof engine working machine characterized by a cooling air intake duct.