JPH04362218A - Operating machine with sound insulation engine - Google Patents

Abstract

PURPOSE:To flow cooling air in an effective manner and facilitate the maintenance without producing a wasteful space in a constitution where an engine and an operating machine are arranged in a soundproof case. CONSTITUTION:An engine body 1 is supported on the side of a case body 24 by a flange part 16 extended from the upper surface of the engine body 1, and the case is partitioned into an upper and a lower parts by means of the flange part 16 and the upper surface of the engine body 1, and the lower part is made as a medium temperature part (D). An operating machine 30 is fitted to the upper surface of the engine body 1. An air intake side of a fan 31 of the operating machine 30 is made an introductory part (A), and the upperstream side is made a low temperature part (B), and the downstream side is made a high temperature side (C) respectively by partitioning the discharge side with a cooler 33. An air cleaner 37 and a control panel 58 are arranged in the low temperature part (B), and an exhaust gas muffler 40, which does not need the low temperature cooled air, is arranged in the high temperature part (C).

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a soundproof engine working machine in which an engine and a working machine driven by the engine are covered with a box-shaped soundproof case.

0002

2. Description of the Related Art In this type of engine working machine, it is necessary to efficiently flow cooling and intake air taken into a soundproof case to various parts. For this reason, conventionally, a large number of partition plates are used to guide the introduced air so that, for example, air warmed by the engine body is not sucked into the air cleaner as intake air.

[0003] Conventionally, an air cleaner, a fuel tank, a cooler, etc. are attached to the engine body or the case at appropriate positions within the case.

0004

[Problems to be Solved by the Invention] As mentioned above, in the past, a large number of partition members were used to guide the cooling air, which made the structure inside the soundproof case complicated and the cooling air passages difficult. It has a complicated bending structure, which tends to create wasted space, and it has the disadvantage that the soundproof case cannot be constructed compactly. Furthermore, since there are many partition members, even if the case lid is removed, the engine body and auxiliary machinery are hidden behind them, making maintenance difficult. Moreover, as mentioned above, maintenance parts and other parts are mixed and installed on the engine body side or the case side, which makes maintenance even more difficult.

[0005] That is, an object of the present invention is to efficiently flow cooling air without creating wasted space in a system in which an engine and a working machine are arranged in a soundproof case, and to facilitate maintenance. shall be.

[0006]

[Means for Solving the Problems] A means for solving the above problems is to first support the engine main body 1 on the case main body 24 side with the flange portion 16 extending from the upper surface of the engine main body 1, and to support the engine main body 1 on the case main body 24 side. 16 and the upper surface of the engine body 1, and the lower part is a medium temperature section D. Furthermore,
A working machine 30 is attached to the upper part of the engine body 1, and the suction side of the fan 31 of the working machine 30 is used as an introduction part A, and the discharge side is partitioned off by a cooler 33, and the upstream side is a low temperature part B,
The downstream side is a high temperature section C. In the low temperature section B, an air cleaner 37 and a control panel 58 are arranged, and in the high temperature section C, an exhaust muffler 40 that does not require low temperature cooling air is arranged. Furthermore, the control panel 58, fuel tank 42, etc., which are not regular maintenance parts, are attached to the removable case lid 25.

[0007]

[Operation] According to the above structure, the inside of the case is divided into an introduction section, a low temperature section, a medium temperature section, and a high temperature section, and each section is arranged according to the respective temperature, so there is no wasted space.
Cooling air can flow. In addition, maintenance parts such as the radiator, air cleaner, battery, and cooler are attached to the engine side, and the fuel tank and control panel are attached to the case lid side, so the maintenance parts can be easily maintained by removing the lid.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show a first embodiment of the present invention. In the figure, 1 is an engine body,
Cylinder block 3 integrally formed with cylinder head 2
A crankshaft 4 is attached through the. 6 is a plate-shaped mounting plate that covers the entire upper surface of the cylinder block 3 of the engine body 1;
fixed on its top surface.

An oil pan 14 is formed of a thin steel plate into a box shape with an open top so as to cover the entire side and bottom surface of the engine body 1, and its upper end overhangs the side of the engine body 1. The mounting plate 6 is attached to the lower surface of the flange portion 16 of the mounting plate 6 with a mounting bracket 18 via a vibration isolating rubber 17.

23 is a lower case body 2 with an open top surface.
4 and a case lid 25 with an open bottom surface that is attached to the lower case body 24 so as to fit therein, and a support base 26 that protrudes inward from the upper end of the lower case body 24. The flange portion 16 of the mounting plate 6, which extends laterally from the engine body 1, is supported via a vibration isolating rubber 27. oil pan 14
A battery 8 is installed in a space with the case body 24 on the side of the crankshaft 4 so that its upper surface is exposed upward.The upper end of the crankshaft 4 protrudes above the mounting plate 6, A generator 30 as a working machine is mounted on the upper right half of the mounting plate 6 in FIG. 1 and near the front corner in FIG. This generator 30
A radial type blower fan 31 is integrally provided on the upper surface of the fan, and a suction fan 32 that sucks air from above and sends air downward is also integrally provided on the lower surface.

On the left side of the generator 30, in the left half of the figure, there is a radiator 33 as a roughly box-shaped cooler.
It is installed so that the space above the mounting plate 6 is partitioned into front and rear parts. A cooling water outlet 35 is provided on the lower side of the bottom wall surface of the radiator 33 to send the cooling water from the radiator 33 to the cooling water jacket 34 of the engine body 1, and a cooling water outlet 35 is provided to flow the cooling water from the cooling water jacket 34 into the radiator 33. An inlet 36 is formed through the mounting plate 6. An intake port 37 is opened on the rear side, and an exhaust port 38 is opened on the front side, penetrating the mounting plate 6, with the radiator 33 in between. An air cleaner 39 is attached directly to the intake port 37, and an exhaust muffler 40 is attached to the exhaust port 38, which projects laterally beyond the mounting plate 6. The exhaust muffler 40 is surrounded by a box-shaped partition wall 41.

As shown in FIG. 2, the fuel tank 42 has an L-shaped horizontal cross section, and each vertical side portion 43, 4 of the L-shape has an L-shaped horizontal cross section.
A rectangular roof-like horizontal part 45 is attached across the upper end of the battery 8, and one of the vertical sides 44 is located in the lateral space of the generator 30 above the battery 8. It is attached to the case lid 25 so as to cover the upper part of the case 30. A fuel feed pump 4 is connected to the upper end of a camshaft 46 protruding from the upper surface of the engine body 1.
7 is placed.

An air intake port 50 is opened in the side wall of the soundproof case 23 corresponding to the end face of the upper horizontal part 45 of the fuel tank 42 on the case 23 side. An air passage inlet 51 for intake air and cooling air that is open to the intake port 50 faces this intake port 50. An air passage 53 for cooling air etc. is connected from its entrance 51 to the horizontal part 4.
5 is formed so as to penetrate through the outlet 53 on the lower surface thereof, and is sent out in the outer circumferential direction shown by the arrow in FIG. 2 by the blower fan 31 below.

In the above, the air passage 53 penetrating the fuel tank 42 that is sucked in by the blower fan 31 is the introduction part A, the upstream side of the radiator 33 which is the outlet side of the blower fan 31 is the low temperature part B, and the partition wall downstream thereof. The area around the exhaust muffler 40 surrounded by 41 becomes a high temperature section C, and the lower side partitioned by the mounting plate 6 and its flange 16 becomes a medium temperature section D. Cooling air sucked in by the suction fan 32 on the lower surface of the working machine 30 flows downward and is supplied to the medium temperature section D. The cooling air that has flowed from the low-temperature section B through the high-temperature section C is discharged from an outlet 55 formed on the side surface of the case lid 25. Further, the cooling air flowing into the medium temperature section D is discharged from an exhaust port 56 formed in the side wall of the case body 24. Note that the front half of the generator 30 in FIG. 2 is surrounded by a baffle plate 57 so that the cooling air sent out from the blower fan 31 is supplied only to the low temperature section B. Furthermore, as shown in FIG. 3, the periphery of the engine body 1 is also surrounded by a partition wall 59.

On the rear side of the generator 30 and fuel tank 42, a thin box-shaped control panel 58 is attached to the inner wall surface of the case lid 25 so that it can be removed together with the case lid 25.

FIG. 4 shows another embodiment of the present invention, in which a radiator 33 is arranged diagonally in a rectangular space on the left side of the generator 30 above the mounting plate 6. The cooling air passage direction of the radiator 33 is arranged along the flow direction of the cooling air. As a result, the passage efficiency of cooling air is improved, and the width of the radiator 33 can be increased by making it oblique, and the cooling efficiency can be improved by increasing the capacity. Conversely, since the height of the radiator 33 can be reduced, the overall structure can be made more compact.

[0017]

[Effects of the Invention] As described above, in this invention, the inside of the case is divided into an introduction section, a low temperature section, a medium temperature section, and a high temperature section, and each part is arranged according to the respective temperature, so there is no wasted space. Cooling air can be flowed without causing noise, the inside of the soundproof case is effectively utilized, and the entire structure can be made compact.

Furthermore, in the second invention of this application, the maintenance parts such as the radiator, air cleaner, cooler, etc. are attached to the engine body side, and the fuel tank and control panel are attached to the case lid side, so that the case lid cannot be closed. By removing the parts, maintenance parts can be easily maintained. Furthermore, if the radiator, air cleaner, cooler, etc. are attached to the case side, the connection to the vibration-isolated and supported engine body becomes complicated, but since they are attached to the engine body side, piping etc. are easy. Moreover, since the engine body is supported in a vibration-proof manner on the upper surface of the engine body, the height is approximately the same as the height of the entire center of gravity, and a structure with less vibration can be obtained.

[Brief explanation of drawings]

FIG. 1 is a partial longitudinal sectional plan view of the entire device showing an embodiment of the present invention.

FIG. 2 is a cross-sectional side view.

FIG. 3 is a cross-sectional view taken at the oil pan portion.

FIG. 4 is a partially cross-sectional plan view showing another embodiment of the invention.

[Explanation of symbols]

1 Engine body 8 Battery 16 Flange part 30 Generator 31　Blower fan 33 Radiator 39 Air cleaner 40 Exhaust silencer 42 Fuel tank A Introduction B Low temperature section C High temperature section D　Medium temperature section

Claims (2)

[Claims] Claim 1: The engine body is supported by a flange extending from the upper surface of the engine body within a soundproof case, and a working machine driven by the engine body is disposed on the upper part of the engine body. A cooler is placed on the side of the machine, and the inside of the soundproof case is divided into the upper surface of the engine body and the lower side, which is partitioned by the flange portion extending from the engine body, as a medium-temperature part, and is used as the suction side of the blower fan attached to the work machine. is the introduction part, and the upstream side of the cooler, which is partitioned at the front and back of the cooling air flow direction, is the low temperature part, and the downstream side is also the high temperature part, and the cooling air sucked in from the introduction part is directed from the low temperature part to the high temperature part. The soundproofing type is characterized in that the cooling air sucked from the introduction part is also flowed to the middle temperature part, and further, an air cleaner and a control panel are arranged in the low temperature part, and an exhaust silencer is arranged in the high temperature part. engine working machine. [Claim 2] The engine body is vibration-proofly supported to the case body by a flange portion extending from the upper surface of the engine body, and a working machine, a blower fan, an exhaust silencer, etc. are mounted on the side of the engine body.
A soundproof engine working machine, characterized in that a cooler is attached, and a control panel and a fuel tank are attached to a case lid that is removable from the case body.