JP7139025B2 - engine work machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine working machine, and for example, to an engine generator that drives a generator with an engine.

As an engine working machine, for example, an engine-equipped generator having an engine and a generator, which are covered with a soundproof wall, is known. For example, Patent Document 1 discloses an engine power generation structure in which generator cooling air for cooling an engine and a generator is flowed inside an internal soundproof wall, and radiator cooling air for cooling a radiator of the engine is flown outside the internal soundproof wall. machine is disclosed.

JP 2017-198143 A

However, in the engine generator disclosed in Patent Document 1, the radiator cooling air cools the radiator after cooling the silencer. For this reason, the engine generator described in Patent Document 1 has poor radiator cooling efficiency. In addition, the low-noise generator described in Patent Document 1 has an external intake port on the side surface, and after cooling the silencer (muffler), new cooling air is supplied, and the soundproofing effect is also deteriorated. was there.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an engine working machine with high cooling efficiency and soundproofing effect.

In order to achieve the above object, the present invention provides an engine in which either or both of an engine compartment in which an engine is installed, a muffler for reducing exhaust noise of the engine, and a radiator for cooling the engine are installed. An engine working machine (for example, an engine generator, an engine welder, an engine compressor, etc.) partitioned into a device section, wherein the engine device section includes a radiator chamber in which the radiator is disposed, and the muffler. a muffler chamber, a first communication passage communicating between a first intake chamber into which outside air is introduced and the engine chamber; a second intake chamber into which outside air is introduced, and the engine device chamber; a first electric fan for sending air in the first communication passage to the engine section; a second electric fan for sending air in the second communication passage to the engine device section; A first duct is provided on the side of the body, the first air supply chamber and the second communication passage are provided with a first duct for sending outside air into the second communication passage, and the air in the engine chamber is discharged through the muffler chamber. and

According to this, since the engine room and the engine device section are thermally independent, the cooling efficiency of the engine room and the engine device section can be enhanced. Further, by partitioning the first air supply chamber and the second air supply chamber, the required amount of air can be supplied to the engine room and the engine device section. Further, since the second communication passage is provided between the second air supply chamber and the engine device section, noise generated by the muffler is less likely to leak into the second air supply chamber. Also, the air in the engine compartment cools the muffler in the muffler compartment, and the heated air after cooling can be exhausted by the first electric fan.

An engine working machine which is divided into an engine compartment in which an engine is installed and an engine equipment section in which either one or both of a muffler for eliminating exhaust noise of the engine and a radiator for cooling the engine are installed. The engine unit section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged, and a first air supply chamber into which outside air is taken and the engine chamber are separated. A communicating first communication passage, a second communication passage connecting a second air supply chamber into which outside air is taken and the engine device section, and a first electric fan for sending air in the first communication passage to the engine chamber. and a second electric fan for sending the air in the second communication passage to the engine device section, the air in the engine chamber is discharged through the muffler chamber, and the second air supply chamber It is preferable to provide a second duct (rear frame duct 155) that communicates with the series of passages. According to this, the second air supply chamber sends cooling air not only to the second communication passage but also to the first communication passage.

An engine working machine which is divided into an engine compartment in which an engine is installed and an engine equipment section in which either one or both of a muffler for eliminating exhaust noise of the engine and a radiator for cooling the engine are installed. The engine unit section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged, and a first air supply chamber into which outside air is taken and the engine chamber are separated. A communicating first communication passage, a second communication passage connecting a second air supply chamber into which outside air is taken and the engine device section, and a first electric fan for sending air in the first communication passage to the engine chamber. a second electric fan that feeds the air in the second communication passage to the engine unit; and a first duct that is disposed on the side surface of the housing and feeds outside air into the first air supply chamber and the second communication passage. a first exhaust passage for discharging air sent into the radiator chamber; and a second exhaust passage for discharging air sent to the engine chamber through the muffler chamber, The second air supply chamber includes a second duct that communicates with the first communication passage, the first exhaust passage exhausts part of the air sent into the radiator chamber, and the first It is preferable to further provide an air exhaust port (for example, roof panel air exhaust port) for exhausting the air discharged from the one exhaust air passage and the remainder of the air sent into the radiator chamber.

In addition, the engine working machine is divided into an engine room in which the engine is arranged, and an engine device section in which either one or both of a muffler for reducing exhaust noise of the engine and a radiator for cooling the engine are arranged. The engine device section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged, and a first air supply chamber into which outside air is taken and the engine chamber. a second communication passage communicating between a second air supply chamber into which outside air is taken and the muffler chamber; and a first electric fan for sending air in the first communication passage to the engine chamber. and a second electric fan for sending the air in the second communication passage to the engine device, wherein the second communication passage is preferably separated from the first communication passage. According to this, the noise in the engine room is suppressed from leaking to the outside through the second communication passage. Further, since the first communication passage and the second communication passage are separated, the cooling of the engine compartment and the cooling of the muffler compartment are completely independent.

When a work machine (for example, a generator, a welder, a compressor, etc.) that works in conjunction with the engine is disposed in the engine room, the first air supply chamber provides air to the intake port of the work machine. It is preferable to have an intake air introducing portion that supplies the According to this, the working machine can be directly cooled without passing through the first communication passage.

Further, in the case of further comprising a housing having an opening/closing door on a side wall, the second air supply chamber and the second electric fan are arranged in either the front or rear portion of the housing. Preferably, when the second electric fan is arranged in the other of the front and rear parts, the second communication path is formed on the inner surface of the opening/closing door. According to this, the first air supply chamber and the second air supply chamber can be integrated into one of the front and rear portions of the housing. Further, by forming the second communication path on the inner surface of the opening/closing door, the heat in the engine compartment is less likely to be conducted to the opening/closing door.

It is preferable to provide a first air discharge passage for discharging air from the engine room and a second air discharge passage for discharging air from the engine device room. By doing so, it is possible to avoid merging of the exhaust winds and prevent turbulence and backflow of the exhaust winds.

It is preferable that the second communication path is heat-shielded from the first air exhaust path and the second air exhaust path. According to this, the heat of the first exhaust passage and the second exhaust passage is not conducted to the second communication passage.

It is preferable that the radiator is disposed in the engine device room, and the second electric fan blows air to the radiator. This increases the cooling efficiency of the radiator.

It is preferable that a third air supply chamber for supplying outside air is further provided, and the first communication passage communicates the first and third air supply chambers with the engine chamber. This increases the cooling air that is pumped into the engine compartment.

ADVANTAGE OF THE INVENTION According to this invention, it is provided with high cooling efficiency and a soundproof effect.

1 is an internal configuration diagram of the engine working machine according to the first embodiment of the present invention, viewed from the right side; FIG. 1 is an internal configuration diagram of the engine working machine according to the first embodiment of the present invention, viewed from the rear; FIG. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of an engine working machine that is a first embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a main body of an engine working machine that is a first embodiment of the present invention; 1 is a plan view showing the structure of a base portion of the engine working machine according to the first embodiment of the present invention; FIG. 1 is a cross-sectional view taken along line AA showing the configuration of a base portion of the engine working machine according to the first embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the structure of a base portion of the engine working machine according to the first embodiment of the present invention; It is the figure which looked at the base part of the engine working machine which is 1st Embodiment of this invention from back. 1 is a perspective view of an air supply partition duct used in a first embodiment of the invention; FIG. It is a perspective view of an air supply partition unit. It is explanatory drawing (1) explaining the flow of the air in the base part of 1st Embodiment of this invention. It is explanatory drawing (2) explaining the flow of the air in the base part of 1st Embodiment of this invention. It is explanatory drawing (3) explaining the flow of the air in the base part of 1st Embodiment of this invention. (a) is a plan view showing an arrangement state of a generator, and (b) is a side view thereof. It is a top view of a protective cover. (a) is a front view of the air supply partition unit to which the sound absorbing material is attached, (b) is a side view, and (c) is a rear view. (a) is a perspective view showing the appearance of a rear frame portion according to the first embodiment of the present invention, and (b) is a perspective view with a top cover removed. FIG. 4 is a cross-sectional view showing the inside of the rear frame portion; (a) is a perspective view of the inner side of the rear cover, and (b) is a perspective view of the outer side. (a) is a perspective view of the outer surface side of the rear cover duct, and (b) is a perspective view of the inner surface side. FIG. 4 is a perspective view showing a state in which a rear cover duct is attached to the rear cover; FIG. 5 is an explanatory diagram for explaining the flow of air in the rear cover portion; (a) is a perspective view of the front frame portion of the first embodiment of the present invention as seen from the front, and (b) is a perspective view of the front frame as seen from the rear. FIG. 3 is a perspective view showing the internal structure of the front frame portion of the first embodiment of the present invention; It is a perspective view showing the arrangement state of the muffler. It is a perspective view which shows the structure of a side door part. It is a perspective view which shows the detailed structure of a side door part. 1 is a perspective view showing the flow of cooling air in the engine working machine according to the first embodiment of the present invention; FIG. FIG. 2 is a configuration diagram showing the flow of cooling air in the engine working machine according to the first embodiment of the present invention; FIG. 4 is a perspective view showing how cooling air flows from a second communication passage to a second electric fan according to the first embodiment of the present invention; FIG. 2 is a perspective view showing how the air in the engine room and the engine device room of the first embodiment of the present invention is exhausted. FIG. 3 is a perspective view showing the back surface of the roof panel of the first embodiment of the invention; FIG. 7 is an internal configuration diagram of the engine working machine according to the second embodiment of the present invention, viewed from the right side; FIG. 7 is an internal configuration diagram of an engine working machine according to a second embodiment of the present invention, viewed from the rear; FIG. 10 is a perspective view showing the appearance of an engine working machine according to a second embodiment of the present invention; FIG. 5 is a perspective view of a main body of an engine working machine according to a second embodiment of the present invention; FIG. 5 is a plan view showing the configuration of the base portion of the engine working machine according to the second embodiment of the present invention; It is a BB sectional view showing the structure of the base part of the engine working machine which is 2nd Embodiment of this invention. It is the figure which looked at the base part of the engine working machine which is 2nd Embodiment of this invention from back. It is the perspective view which looked at the base side member from the diagonal upper right. It is the perspective view which looked at the base side member from the diagonal lower right. It is the perspective view which looked at the base side member from diagonally upper left. FIG. 5 is a perspective view of an air supply partition duct used in a second embodiment of the present invention; It is explanatory drawing (1) explaining the flow of the air in the base part of 2nd Embodiment of this invention. It is explanatory drawing (2) explaining the flow of the air in the base part of 2nd Embodiment of this invention. It is explanatory drawing (3) explaining the flow of the air in the base part of 2nd Embodiment of this invention. FIG. 7 is a perspective view showing the appearance of a rear frame portion according to a second embodiment of the present invention; It is a perspective view in the state which removed the upper surface cover. FIG. 4 is a cross-sectional view showing the inside of the rear frame portion; It is a perspective view (1) of a rear frame duct. It is a perspective view (2) of a rear frame duct. FIG. 4 is a perspective view of a rear cover duct ASSY; It is a perspective view (1) of the duct outside the rear cover. It is a perspective view (2) of the duct outside the rear cover. It is a perspective view (1) which shows the internal structure of a front-frame part. It is a perspective view (2) which shows the internal structure of a front-frame part. FIG. 7 is a perspective view showing the internal structure of the front frame portion of the second embodiment of the present invention; FIG. 10 is a perspective view showing the arrangement state of the muffler according to the second embodiment of the present invention; It is a side view of a front frame part. FIG. 7 is a configuration diagram showing the flow of cooling air in the engine working machine according to the second embodiment of the present invention; It is an explanatory view (1) explaining a flow of air of the 1st air supply room which is a 2nd embodiment of the present invention. It is a perspective view showing the flow of the cooling air of the 1st air supply chamber which is 2nd Embodiment of this invention (2). FIG. 7 is a configuration diagram showing the flow of cooling air in the engine working machine according to the second embodiment of the present invention; Fig. 11 is a perspective view (1) showing how cooling air flows from the second communication passage to the second electric fan; Fig. 10 is a perspective view (2) showing how cooling air flows from the second communication passage to the second electric fan; 1 is a perspective view (1) showing how air in an engine room and an engine device is exhausted; FIG. FIG. 2 is a perspective view (2) showing how air in an engine room and an engine device portion is exhausted. It is a perspective view (3) which shows a mode that the air of an engine room and an engine apparatus part is exhausted. FIG. 5 is a perspective view showing the back surface of the roof panel of the second embodiment of the invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, each figure is only shown roughly to such an extent that this embodiment can be fully understood. Moreover, in each figure, the same code|symbol is attached|subjected about a common component and a similar component, and those overlapping description is abbreviate|omitted.

(First embodiment)
FIG. 1 is an internal configuration diagram of an engine working machine that is an embodiment of the present invention, viewed from the right side.
The engine working machine 100 particularly includes an engine 10 as an internal combustion engine, a radiator 11 as a cooler, a muffler 12 as a silencer, a fuel tank 13, a first electric fan 17, and a second electric fan 18. , an air cleaner 19 and a generator 20 . "Up and down", "back and forth" and "left and right" in the description of engine working machine 100 follow the arrows in FIGS.

The engine working machine 100 is divided into an engine room 1 in which an engine 10 and a generator 20 are arranged, and an engine device section (engine device room 2) in which a radiator 11 and a muffler 12 are arranged. Since the engine room 1 and the engine device room 2 are separated, the other is less likely to be thermally affected. It should be noted that the engine device section of the present embodiment consists of one space (engine device room 2).

Engine 10 drives generator 20 . The radiator 11 exchanges heat with cooling water circulating through the engine 10 . The muffler 12 muffles the exhaust noise of the engine 10. - 特許庁The fuel tank 13 stores fuel for driving the engine 10 . The first electric fan 17 cools the engine compartment 1 . The second electric fan 18 cools the engine compartment 2 and is arranged near the radiator 11 . The air cleaner 19 removes dust and dirt contained in the air taken into the engine. The generator 20 is an AC generator that converts the mechanical output of the engine 10 into electrical output (electric power).

In the engine device room 2, the second electric fan 18 blows cooling air to the radiator 11 and cools the downstream muffler 12 with the blown air. Thereby, the cooling capacity of the radiator 11 becomes higher than that of the muffler 12 . The first air supply chamber 3 is a space for taking in outside air (air taken in from outside the device) for cooling the engine 10 and the generator 20 . The roof panel exhaust port 81 is arranged in the upper part of the housing, and exhausts the air warmed by the radiator 11, the muffler 12 and the engine 10. As shown in FIG. A fuel tank 13 is disposed at the bottom.

FIG. 2 is an internal configuration diagram of the engine working machine, which is an embodiment of the present invention, viewed from the rear.
In the engine working machine 100, air supply chambers (first air supply chamber 3 (FIG. 1), left and right second air supply chambers 5, 5, and third air supply chamber 7) into which outside air is taken are concentrated in the rear part of the device. there is As will be described later, the first air supply chamber 3 (Fig. 1) and the third air supply chamber 7 take in the air (outside air) supplied to the engine room 1, and the second air supply chamber 5 has The air (outside air) supplied to the engine device chamber 2 is taken in. Since the first air supply chamber 3 and the third air supply chamber 7 for supplying air to the engine room 1 and the second air supply chamber 5 for supplying air to the engine device room 2 are separated, the necessary air required for cooling can be easily supplied to the engine room 1 and the engine device room 2.

FIG. 3 is a perspective view showing the appearance of the engine working machine that is the embodiment of the present invention.
The engine working machine 100 includes a body portion 95 (see FIG. 4), a decorative cover 96 that covers the body portion 95, and a front frame door 72 at the front. The body portion 95 includes a base portion 30 and a rear cover 55 and a rear door 58 at the rear. The decorative cover 96 includes a roof panel 80 on the upper surface, a front side panel 74 , a front side door 63 , a rear side door 64 and a rear side panel 53 . The roof panel 80 has a roof panel exhaust port 81 and is bolted to the front side panel 74 bolted to the base portion 30 and the rear side panel 53 .

The rear side panel 53 and the front side panel 74 are L-shaped in cross section. In particular, a louver 52 is attached to the rear side panel 53 . The short side ends of the rear side panel 53 abut on the side surface of the rear frame 51 (FIG. 4). One of the left and right short side ends of the left and right front side panels 74 is provided with a retractable hinge, and the other is provided with a locking portion. As a result, the front frame door 72 is rotatably attached to the left and right front side panels 74 .

FIG. 4 is a perspective view of the main body of the engine working machine that is the embodiment of the present invention.
The body portion 95 includes a base portion 30 , a rear frame portion 50 , left and right door frames 61 , a front frame portion 70 and an inner roof panel 82 . The rear frame portion 50 has a rear cover 55 , a rear door 58 and a rear frame 51 . The front frame portion 70 has a front frame 71 . The left and right door frames 61 are fixed to the rear frame 51 and the front frame 71 with bolts. The upper surface cover 57 that covers the upper surface of the rear frame portion 50 and the front frame side covers 73 that cover the left and right side surfaces of the front frame portion 70 are collectively referred to as an internal cover 97 .

(base part)
FIG. 5 is a plan view showing the configuration of the base portion of the engine working machine according to the embodiment of the present invention, FIG. 6A is a sectional view taken along line AA, and FIG. 7 is its side view.

The base portion 30 includes a base partition plate 31 (FIGS. 5 and 6), end plates 32 on both sides of the rear portion (FIG. 7), L-shaped members 33 and 33 on both sides (FIGS. 5 and 7), and U-shaped members on both sides. Approximately U-shaped) members 34, 34 (FIGS. 5 and 7), approximately L-shaped member 36 (FIG. 6A), air supply partition duct 37 (FIG. 6A), and air supply partition unit 40 (FIGS. 5, 6A, 7 ). The base partition plate 31 partitions the engine compartment 1 and the fuel tank compartment. The base partition plate 31 is fixed to the U-shaped member 34 . At the rear of the vertical portion of the U-shaped member 34, an opening 35 (FIGS. 6A and 7) with lattice-like holes is formed. The end plate 32 is welded to the rear end of the U-shaped member 34 .

One surface of the L-shaped member 33 is arranged to face the opening 35 , and the other surface is welded to the upper portion of the U-shaped member 34 . The air supply partition unit 40 is arranged in parallel with the upper surfaces of the U-shaped members 34, 34 on both sides, and is attached to each base-side receiving portion described later and the substantially L-shaped member receiving portion 36a of the substantially L-shaped member 36 at the bottom. Fixed. The air supply partition duct 37 is fixed to the air supply partition unit 40 as described later. The substantially L-shaped member 36, the vertical portion at the rear of the U-shaped member 34, the flat plate 40a of the air supply partition unit 40 (FIG. 9), and the base end plate 30a at the center of the rear of the base portion 30 (FIGS. 5, 6A, and 6B) , a cuboid space is formed. This rectangular parallelepiped space is the first air supply chamber 3 described above. In other words, the substantially L-shaped member 36, the U-shaped member 34, the flat plate 40a (FIG. 9), and the base end plate 30a constitute the first air supply portion container.

At the upper end of the vertical portion of the substantially L-shaped member 36, a substantially L-shaped member receiving portion 36a is provided by bending horizontally in the rearward direction. At the upper end of the base end plate 30a at the center of the rear portion of the base portion 30, a base end plate receiving portion 30b is bent horizontally in the forward direction. A base receiving portion 30c having an L-shaped cross section is welded to the upper end of the vertical portion of the U-shaped member 34 as a member horizontal inward. Further, the substantially L-shaped member receiving portion 36a, the base end plate receiving portion 30b, and the base receiving portion 30c are at the same height so as to be horizontal. Since the surface of the substantially L-shaped member 36 is inclined at an angle α, water droplets such as rainwater flow out of the device.

FIG. 8 is a perspective view of an air supply partition duct used in the first embodiment;
The air supply partition duct 37 includes a flat plate 37a that is rectangular in plan view, an inner wall 37b that is U-shaped (substantially U-shaped) in plan view, and U-shaped side walls 37c and 37c that are connected to both ends of the inner wall 37b. and A first notch portion 39 is formed between a connecting portion connecting one side wall 37c and the inner wall 37b and a connecting portion connecting the other side wall 37c and the inner wall 37b. The side wall 37c can be formed by bending a plate material, but the inner wall 37b is formed by welding one side of a plan view U-shaped member (substantially U-shaped member) and the flat plate 37a. A second cutout portion 38 having neither a side wall nor an inner wall is formed on the opposite side of the first cutout portion 39 .

FIG. 9 is a perspective view of the air supply partition unit.
The air supply partition unit 40 includes a flat plate 40a having a rectangular shape in a plan view, and a fixing portion 40h fixed to the inner wall (not shown) of the rear frame 51, and an end portion of a guide plate 40b that guides outside air to the generator 20. Constructed by joining. The guide plate 40b is composed of a pair of front and rear plates on which semicircular guide portions 45, 45 are formed, and a pair of lateral plates connecting two sides of the pair of front and rear plates. The guide plate 40b is also a tubular body (rectangular tubular body) having a rectangular cross-sectional view. In the flat plate 40a, a grid-like second opening 43 is formed inside the guide plate 40b, and two grid-like first openings 42 are formed outside the guide plate 40b. there is Further, the air supply partition unit 40 is formed with a plurality of screw holes 40c for fixing the fixing portion 37d (FIG. 8) of the air supply partition duct 37. As shown in FIG.

10 to 12 are explanatory diagrams for explaining air flow in the base portion of the first embodiment. In FIG. 11, an air supply partition duct 37 is added to the state of FIG. 10, and in FIG. 12, an air supply partition unit 40 is added to the state of FIG.
In FIG. 10, outside air taken in from both sides of the base portion 30 rises vertically between the L-shaped member 33 and the U-shaped member 34 and passes through an opening 35 formed in the U-shaped member 34 . The outside air that has passed through the opening 35 flows into the space (first air supply chamber 3) formed between the air supply partition duct 37 (Fig. 11) and the substantially L-shaped member 36 (Fig. 10).

As shown in FIG. It passes through the notch portion 39 . The air that has passed through the first notch 39 rises through the second opening 43 of the air supply partition unit 40 in FIG. In addition, the guide plate 40b functioning as a rectangular tubular body is called the third communication passage 15 (Fig. 28). Also, the air that has passed through the second notch 38 rises through the first openings 42 , 42 of the air supply partition unit 40 and flows into the engine room 1 through the first electric fan 17 . In other words, the air supply partition duct 37 divides the taken outside air into air rising inside the rectangular tubular body (the guide plate 40b) and air rising outside the guide plate 40b.

FIG. 13(a) is a plan view showing the arrangement of the generator, and FIG. 13(b) is a side view thereof.
The generator 20 has a cylindrical shape, and is fixed to the generator fixing pedestal 30d (FIG. 6A) via a vibration-damping support member (not shown) on the generator leg 22. As shown in FIG. The generator 20 incorporates a generator fan (not shown). An intake port 20a and an exhaust port 20b are formed on the outer circumference of the generator 20 . Protective covers 25a and 25b are attached to the intake port 20a and the exhaust port 20b to prevent dust and the like from entering and to prevent danger from rotating parts. The intake port 20a is closed by a guide plate 40b (FIG. 9) of the air supply partition unit 40, and sucks the air rising inside the guide plate 40b. That is, the guide portions 45 and 45 function as air introduction portions that introduce cooling air into the generator 20 . Air discharged from the exhaust port 20 b flows into the engine room 1 .

FIG. 14 is a plan view of the protective cover.
The protective covers 25a and 25b are thin metal plates with a large number of holes formed in a mesh pattern. The protective covers 25a and 25b are bent in a semicircular or arcuate shape and fixed to the inlet 20a and the outlet 20b of the generator 20 . The shape of the protective cover 25b is such that the length of the protective cover 25a is such that both end portions thereof can be engaged with each other, as shown in FIG. 13(b).

15(a) is a front view of an air supply partition unit to which a sound absorbing material is attached, FIG. 15(b) is a side view, and FIG. 15(c) is a rear view. It is a diagram.
A sound absorbing material 26 is attached to each surface of the guide plate 40 b of the air supply partition unit 40 . That is, the sound absorbing material 26 is attached to the front and back of the front and rear plate members (the front surface 40d and the rear surface 40e) of the guide plate 40b and to the upper inner side 40g of the left and right plate members (the left and right surfaces 40f). The sound absorbing material 26 on the front and back surfaces of the front surface 40d and the rear surface 40e extends to the upper portion of the semicircular portion of the guide plate 40b. As a result, the generator 20 is protected from interference with the guide portion 45 due to vibration using the extension portion 26a as a cushioning material.

(rear frame part)
FIG. 16(a) is a perspective view showing the appearance of the rear frame portion, and FIG. 16(b) is a perspective view of the rear frame portion with the top cover removed.
The rear frame portion 50 includes a rear frame 51, a fan side cover 54 (FIG. 16(b)), a rear cover 55, a rear door 58, an upper surface cover 57, and a control box 90 (FIG. 16(b)). . When the top cover 57 is removed from the rear frame portion 50, the control box 90 is exposed.

The rear frame 51 has a substantially rectangular parallelepiped shape and is formed with a projecting portion 51a. A control box 90 is arranged inside the rear frame 51 . The first electric fan 17 is attached to the projecting portion 51a. An opening 51b (FIG. 16(b)) to which a fan side cover 54 for inspection is attached is formed in the projecting portion 51a. The upper portion of the projecting portion 51a is open. The rear cover 55 is fixed to the rear frame 51 . The rear door 58 is fixed to the rear frame 51 so that it can be opened and closed. When the rear door 58 is opened, the openable control plate 90a (FIG. 17) is exposed, and when the control plate 90a is opened, the control box 90 is exposed.

FIG. 17 is a cross-sectional view showing the inside of the rear frame portion.
A first electric fan 17 and a control box 90 are arranged on the upper portion of the rear frame portion 50 , and a generator 20 is arranged on the lower portion of the rear frame portion 50 . A rear cover duct 59 is attached to the rear cover 55 as will be described later. Cooling air flowing out from an opening 59 a (see FIG. 20 ) formed in the upper portion of the rear cover duct 59 is taken into the first electric fan 17 through the space between the first electric fan 17 and the control box 90 .

FIG. 18(a) is a perspective view of the inner side of the rear cover, and FIG. 18(b) is a perspective view of the outer side.
The rear cover 55 has a substantially rectangular shape, and side walls 55b are formed on two long sides (upper and lower sides), and side walls 55c are formed on two short sides (left and right sides). A rectangular opening 55a is formed in the lower side wall 55b. A stud bolt (not shown) for attaching the rear cover duct 59 is welded to the rear cover 55 . The side wall 55b on the long side is formed in an L-shape when viewed in cross section, and functions as a mounting surface to which the upper surface is attached to the rear frame 51 (FIG. 16) and the lower surface is attached to the base portion 30. As shown in FIG.

FIG. 19(a) is a perspective view of the outer side of the rear cover duct, and FIG. 19(b) is a perspective view of the inner side.
The rear cover duct 59 has a rectangular flat portion 59e smaller than the rear cover 55, and side walls 59d formed on one long side (upper side) and two short sides (left and right sides) of the flat portion 59e. The side walls 59d on the left and right sides are formed in an L-shape when viewed in cross section, and the two left and right sides function as mounting surfaces for mounting to the rear cover 55 (FIG. 18).

The other long side of the rear cover duct 59 does not have a side wall and has a notch 59b. A plurality of rectifying plates 59c are provided in parallel with the short sides of the notch 59b. An opening 59a is formed in the plane portion 59e. The opening 59a is formed near one long side (upper side), that is, on the opposite side of the notch 59b.

FIG. 20 is a perspective view showing a state in which the rear cover duct is attached to the rear cover.
The rear cover duct 59 is fixed to the inner surface of the rear cover 55 . At this time, the mounting surface of the side wall 59 d contacts the inner surface of the rear cover 55 . Also, the notch portion 59b of the rear cover duct 59 is brought into contact with the side wall 55b in which the opening portion 55a is formed. As a result, the opening 59 a of the rear cover duct 59 is located on the opposite side of the opening 55 a of the rear cover 55 . Further, by providing the rear cover duct 59, the noise generated inside the apparatus is less likely to leak from the opening 55a.

FIG. 21 is an explanatory diagram for explaining the flow of air in the rear cover portion.
The rear cover duct 59 is fixed to the inner surface of the rear cover 55 (FIG. 20). Outside air flowing in from the opening 55a (FIG. 20) of the rear cover 55 passes through the notch 59b of the rear cover duct 59 and enters the space (the third air supply chamber 7 (FIG. 2)) between the rear cover duct 59 and the rear cover 55. to rise. The rising air then travels through the opening 59 a of the rear cover duct 59 toward the space between the first electric fan 17 and the control box 90 . That is, the air rising in the third air supply chamber 7 joins the air rising from the first opening 42 of the air supply partition unit 40 (FIG. 12).

(front frame part)
FIG. 22(a) is a perspective view of the front frame as seen from the front, and FIG. 22(b) is a perspective view of the front frame as seen from the rear.
The front frame portion 70 includes a front frame 71 , a front frame side cover 73 , a front frame partition plate 75 and a front frame upper surface cover 79 . The front frame 71 is a rectangular parallelepiped housing fixed to the base portion 30 . The front frame side covers 73 are attached to the left and right side surfaces of the front frame 71 . The front frame partition plate 75 closes the front portion of the upper surface of the front frame 71 . The front frame upper surface cover 79 closes the rear portion of the upper surface of the front frame 71 .

FIG. 23 is a perspective view showing the internal structure of the front frame portion, in which the front frame side covers 73, the front frame upper surface cover 79 and the muffler 12 (FIG. 24) of the front frame portion 70 are removed from the state shown in FIG. is shown.

A second electric fan mounting bracket 77 is bolted to the front frame 71, and two radiator mounting brackets (not shown) are welded thereto. A radiator 11 is attached to the radiator mounting bracket. A second electric fan 18 that cools the radiator 11 is attached to the second electric fan mounting bracket 77 . The second electric fan mounting bracket 77 has a substantially rectangular parallelepiped shape, and has an open front surface and four side surfaces. As will be described later, air flows in from four side openings 77a (FIG. 29).

Each of the left and right side surfaces of the front frame 71 is provided with two grooves that are U-shaped (substantially U-shaped) in cross section. The two grooves function as the first exhaust passage 8 and the second exhaust passage 9 by being covered with the front frame side cover 73 (FIG. 22(a)). By partitioning and separating the first exhaust air passage 8 and the second exhaust air passage 9, the confluence of the exhaust winds is avoided, and the turbulence and backflow of the exhaust winds are prevented.

An opening 8 a communicating with the engine room 1 is formed in the lower portion of the first exhaust air passage 8 . An opening 9a communicating with the engine device chamber 2 (FIG. 24) is formed in the lower portion of the second exhaust air passage 9. As shown in FIG. Further, a heat insulating material 27a is attached to the lower portion of the back surface of the first exhaust air passage 8 (the inner surface of the front frame 71). A heat insulating material 27b is attached to the inner surface of the second air discharge passage 9 (the outer surface of the front frame 71).

FIG. 24 is a perspective view showing an arrangement state of the muffler.
24 shows the state of FIG. 23 with the second electric fan 18, the radiator 11, the second electric fan mounting bracket 77, the radiator mounting bracket (not shown), the front frame partition plate 75, and the heat insulating materials 27a and 27b. is removed.
A muffler bracket 14 is attached to the front frame 71 , and the muffler 12 is attached to the muffler bracket 14 . In other words, the internal space of the front frame 71 accommodates the muffler 12 and the radiator 11 and functions as the engine device room 2 .

The muffler 12 is connected to an inlet pipe 12a and a tail pipe 12c. An exhaust pipe 12b is connected to the inlet pipe 12a. The inlet pipe 12a is laid in the second exhaust passage 9 through the right opening 9a. With this structure, the second exhaust air passage 9 exhausts the air heated in the engine device room 2 and also exhausts the heat of the inlet pipe 12a. The exhaust pipe 12b is bent in an L-shape at the upper portion of the second air exhaust passage 9 and runs through the upper portion of the first air exhaust passage 8 substantially horizontally. In addition, the heat insulating material 27b (Fig. 23) insulates the radiant heat of the inlet pipe 12a and prevents the air (F25) (Fig. 27) toward the second electric fan 18, which will be described later, from becoming hot. The tail pipe 12c is laid in the second exhaust air passage 9 on the left side.

An inclined surface 71a is formed on the lower rear portion of the front frame 71. As shown in FIG. Behind this inclined surface 71a is the engine room 1, and the air in the engine room 1 flows into the first exhaust air passage 8 through the opening 8a. In addition, since the muffler 12 is disposed on the back surface of the first exhaust passage 8 (the inner surface of the front frame 71), the heat insulating material 27a (FIG. 23) insulates the radiant heat of the muffler 12, 8 is prevented from being heated, and air (F24) (FIG. 27) passing through the second communication passage 6, which will be described later, is prevented from reaching a high temperature. Furthermore, by attaching a heat insulating material (not shown) to the first air exhaust passage 8 and the second air exhaust passage 9 side of the front frame side cover 73, the air (F23) passing through the second communication passage 6, which will be described later, is reduced. , (F24) (FIG. 27) are kept from becoming hot.

(Side door part)
FIG. 25 is a perspective view showing the structure of the side door portion.
The side door section 60 is included in the decorative cover 96 (FIG. 3) and includes a door frame shield 62, two side door ducts 65, a front side door 63, a rear side door 64, and a trim seal 66 (FIG. 3). 26). 25 shows a rear frame 51 and a front frame 71 in addition to the side door portion 60. As shown in FIG. Although there are two combinations of the side door duct 65 and the front side door 63 and the side door duct 65 and the rear side door 64, only one is shown. Also, the illustrated door frame 61 is included in the body portion 95 (FIG. 4), as described above.

The door frame shield 62 is formed with two rectangular openings 62a and 62b. Door frame shield 62 is secured to front side panel 74 and rear side panel 53 . A front side door 63 and a rear side door 64 are attached to the door frame shield 62 so as to be openable and closable with hinges 67 (FIG. 26). The side door duct 65 is attached to the inner surfaces of the front side door 63 and the rear side door 64 . The side surface of the side door duct 65 is approximately the same size as the front side door 63 and the rear side door 64 . The side door duct 65 is hollow, and the internal gap D1 is the same as the gap D2 between the rear side panel 53 and the rear frame 51 (D1=D2). As a result, the space between the rear side panel 53 and the rear frame 51 functions as the second air supply chamber 5 (FIG. 2). A louver 52 ( FIG. 3 ) is attached to the louver opening 53 b of the rear side panel 53 .

Further, the outer surface of the side door duct 65 (the surface facing the front side door 63 and the rear side door 64) functions as a sound insulation wall 65a. The side door duct 65 is provided inside the front side door 63 and the rear side door 64 . Therefore, the temperature of the engine compartment 1 is less likely to be transmitted to the surfaces of the front side door 63 and the rear side door 64 . Moreover, since the second communication passage 6 (Fig. 27) is separated from the first communication passage 4 (Fig. 27), there is also a soundproofing effect. Further, a heat insulating material (not shown) is attached to the side door duct 65 on the side of the engine compartment 1 (FIG. 1). This heat insulating material can block the heat flow from the engine room 1 and prevent the air (F23) and (F24) (FIG. 27) passing through the second communication passage 6 described later from becoming hot.

When the front side door 63 and the rear side door 64 are closed, the side door duct 65 contacts the door frame 61 and the front side door 63 and the rear side door 64 contact the door frame 61 . The side door duct 65 is thereby housed between the door frame shield 62 and the door frame 61 . As a result, the side door duct 65 functions as a second communication passage 6 (FIG. 27) that feeds outside air flowing in from the louver opening 53b of the rear side panel 53 to between the front side door 63 and the side surface of the front frame 71. .

FIG. 26 is a perspective view showing the detailed structure of the side door portion.
As described above, in the side door portion 60, the front side door 63 and the rear side door 64 to which the side door duct 65 is joined are attached to the door frame shield 62 by hinges 67 so as to be openable and closable. Also, the side door duct 65 when the door is closed is accommodated between the door frame shield 62 and the door frame 61 . A trim seal 66 is provided on the door frame 61 so that the air in the engine compartment 1 does not escape from between the side door duct 65 and the door frame 61 .

FIG. 27 is a perspective view showing the flow of cooling air in the engine working machine according to the embodiment of the invention, and FIG. 28 is a configuration diagram showing the flow of cooling air in the engine working machine according to the embodiment of the invention. be.
The outside air (F1) sucked from the opening 35 of the U-shaped member 34 enters the space (first supply) between the substantially L-shaped member 36 (FIGS. 6A and 10) and the air supply partition duct 37 (FIGS. 6A and 11). It is taken into the air chamber 3). The outside air taken into the first air supply chamber 3 branches at the first notch 39 and the second notch 38 of the air supply partition duct 37 (FIG. 11). The air that has passed through the second notch 38 passes through the first opening 42 (FIG. 12) of the air supply partition unit 40 (F11), and reaches the outside of the rear cover 55 and the guide plate 40b of the air supply partition unit 40 and the power generation. 20 (first communication passage 4). On the other hand, the air that has passed through the first notch portion 39 passes through the second opening 43 (FIG. 12) of the air supply partition unit 40, the rectangular tubular body (the guide plate 40b), and the air introduction portion (the guide portion 45). (F12), it is taken into the intake port 20a of the generator 20 (FIG. 13(b)).

Next, outside air flowing in from the opening 55a (FIG. 18(a)) of the rear cover 55 rises through the space between the rear cover 55 and the rear cover duct 59 (F31). A space between the rear cover 55 and the rear cover duct 59 is called a third air supply chamber 7 . 17 through the opening 59a (FIG. 20) of the rear cover duct 59 and between the rear cover 55 and the generator 20. and the control box 90. Here, the space between the rear cover 55 and the generator 20 and the space between the first electric fan 17 and the control box 90 are called the first communication passage 4 . Also, the outside air in the third air supply chamber 7 flows out between the rear cover 55 and the generator 20 to join the airflow F11 from the first air supply chamber 3 . That is, the cooling air passing through the first communication passage 4 is increased by allowing the outside air taken in through the third air supply chamber 7 to join the first air supply chamber 3 .

The air (F32) that has flowed into the first communication passage 4 is sent into the engine room 1 by the first electric fan 17 . The air that has flowed into the generator intake port of the generator 20 arranged in the engine room 1 is discharged to the engine room 1 from the generator discharge port.

Next, the outside air (F21) taken into the space (second air supply chamber 5) between the rear side panel 53 and the rear frame 51 through the louver 52 flows through the two side door ducts 65 (second communication passages). 6) (F22, F23). The air that has passed through the side door duct 65 flows between the front side panel 74 and the front frame side cover 73 (FIG. 29) (F24), and is directed to the second electric fan 18 (F25). A space between the front side panel 74 and the front frame side cover 73 is also included in the second communication path 6 .

Since the second communication passage 6 is provided inside the opening/closing doors (the front side door 63 and the rear side door 64), the heat from the high-temperature engine compartment 1 is less likely to be transmitted to the opening/closing doors. Further, since the second communication passage 6 is separated from the first communication passage 4, a soundproofing effect is also obtained. Further, since the second communication passage 6 is shielded from heat from the first exhaust passage 8 and the second exhaust passage 9, it is possible to suppress the temperature rise of the cooling air.

FIG. 29 is a perspective view showing how cooling air flows from the second communication passage to the second electric fan.
The air flowing between the front side panel 74 (FIG. 25) and the front frame side cover 73 (the second communication passage 6) flows through the front surface of the front frame front cover 76 and the four side surfaces of the second electric fan mounting bracket 77. The air is drawn into the second electric fan 18 through the opening 77a.

FIG. 30 is a perspective view showing how the air in the engine room and the engine device room is exhausted.
The air in the engine room 1 flows into the first exhaust air passage 8 through the opening 8a and rises in the first exhaust air passage 8. As shown in FIG. Further, in the engine device room 2, the air blown by the second electric fan 18 onto the radiator 11 (FIG. 1) descends along the rear surface 71b of the front frame 71 (F26), and reaches the rear surface of the front frame front cover 76. It flows out from the opening 9a while following (F27). Then, the air that has flowed out from the opening 9 a rises through the second exhaust air passage 9 . Further, by partitioning/separating the first exhaust air passage 8 and the second exhaust air passage 9, the merging of the exhaust winds is avoided, and turbulence and backflow of the exhaust winds are prevented.

(roof panel)
FIG. 31 is a perspective view showing the back surface of the roof panel. Note that the surface of the roof panel is shown in the perspective view of FIG.
The roof panel 80 (FIG. 27) has openings 80a provided on both sides of the inner surface, an opening 80b in the center, and a roof panel exhaust port 81 (FIGS. 3 and 27) provided on the outer surface. As described above, the front frame partition plate 75 and the front frame upper surface cover 79 are attached to the front frame 71 (Fig. 22(a)), and the main body 95 (Fig. 4) has an internal roof panel. 82 is provided.

The air that has risen through the first exhaust air passage 8 (FIG. 30) and the second exhaust air passage 9 (FIG. 30) flows through the front frame partition plate 75, the front frame upper surface cover 79, the inner roof panel 82, and the roof panel 80. and is discharged from the roof panel exhaust port 81 through the openings 80a and 80b on both sides.

(Second embodiment)
In the engine working machine 100 of the first embodiment, the engine device section is defined as one space (engine device room 2), and both the muffler 12 and the radiator 11 are arranged in one space. In the second embodiment, the interior of the engine device is divided into a radiator chamber in which the radiator 11 is arranged and a muffler chamber in which the muffler 12 is arranged.

FIG. 32 is an internal configuration diagram of the engine working machine according to the second embodiment of the present invention as seen from the right side.
Similar to the engine working machine 100 of the first embodiment, the engine working machine 200 includes an engine 10 as an internal combustion engine, a radiator 11 as a cooler, a muffler 12 as a silencer, a fuel tank 13, a A first electric fan 17, a second electric fan 18, an air cleaner 19, and a generator 20 are provided. Engine working machine 200 is divided into three chambers: engine room 1 in which engine 10 and generator 20 are arranged; muffler room 103 in which muffler 12 is arranged; and radiator room 104 in which radiator 11 is arranged. It differs from the engine working machine 100 in that Here, the muffler chamber 103 and the radiator chamber 104 are partitioned by a partition plate inclined surface 171a and a partition plate 171f (see FIG. 59B). The muffler chamber 103 and the radiator chamber 104 are collectively referred to as an engine device section 102 .

As shown in FIG. 28, the engine working machine 100 of the first embodiment has an opening 35 of the first air supply chamber 3, a louver 52 of the second air supply chamber 5, and an opening of the third air supply chamber 7. Outside air was taken in from the portion 55a (Fig. 18(a)). On the other hand, as shown in FIG. 32, the engine working machine 200 of the present embodiment includes an intake branch chamber 101 having an opening 105a in front of the opening 35 of the first air supply chamber 3. As shown in FIG. That is, the engine working machine 200 takes in outside air from the opening 105 a of the intake branch chamber 101 , the louver 52 of the second air supply chamber 5 , and the opening 55 a of the third air supply chamber 7 .

The intake branch chamber 101 is a space between the base side member 105 and the U-shaped member 134, as shown in FIG. The base side member 105 is formed with an opening 105a (FIGS. 32, 34, 38B, and 56), and the U-shaped member 134 is formed with an opening 134a (FIGS. 35, 36, and 40). It is The intake branch chamber 101 is also called a base side duct (first duct). The intake branch chamber 101 branches the external air taken in from the opening 105a into the front and rear. The outside air branched forward is sent to the front side of the second communication passage 6 (FIG. 56) through the opening 134a, and the outside air branched rearward is sent to the opening 35 (FIGS. 37B, 40, and 56). is sent to the first air supply chamber 3 through the

FIG. 33 is an internal configuration diagram of the engine working machine according to the second embodiment of the present invention as seen from the rear.
Like the engine working machine 100 of the first embodiment, the engine working machine 200 has a plurality of air supply chambers (first air supply chamber 3 (FIG. 1), left and right second air supply chambers 5, 5, third It has an air supply chamber 7). Further, engine working machine 200 includes intake branch chambers 101 and rear frame ducts 155 on the left and right sides, respectively. The rear frame duct 155 takes in the air in the second air supply chamber 5 through the opening 151a (Fig. 35) and flows it to the first communication passage 4 (Fig. 56).

FIG. 34 is a perspective view showing the appearance of the engine working machine according to the second embodiment of the present invention.
The engine working machine 200 includes a main body portion 195 (see FIG. 35), a decorative cover 110 that covers the main body portion 195, and a front frame door 72 at the front. The body portion 195 includes a base portion 130 (FIG. 35) and a rear cover 55 and a rear door 58 at the rear. The decorative cover 110 includes a rear roof panel 106, a center roof panel 107, a front roof panel 108, a front side panel 74, a front side door 63, a rear side door 64, and a rear side panel 53. . A roof panel exhaust port 109 is formed in the front roof panel 108 . The rear roof panel 106, the center roof panel 107 and the front roof panel 108 correspond to the roof panel 80 of the first embodiment.

FIG. 35 is a perspective view of the main body of the engine working machine according to the second embodiment of the present invention.
The main body portion 195 includes a base portion 130, a rear frame portion 150, left and right door frames 61, a front frame portion 170, an inner roof panel 182, and an inner cover, similarly to the main body portion 95 of the first embodiment. 97. The rear frame portion 150 has a rear cover 55 , a rear door 58 and a rear frame 151 . The base portion 130 includes the base side member 105 (FIG. 34) described above.

An opening 182a is formed in the upper surface of the inner roof panel 182. As shown in FIG. A first electric fan 17 communicating with the opening 182 a causes the air between the inner roof panel 182 and the decorative cover 110 to flow into the first communication passage 4 . As a result, the air trapped inside the center roof panel 107 is discharged. An opening 134 a is formed on the front side of the upper surface of the U-shaped member 134 . Outside air taken in from the opening 105a (FIGS. 32, 38B, and 38C) passes through the intake branch chamber 101 and flows into the opening 134a. A side surface of the rear frame 151 is formed with an opening 151a. Outside air taken in from the louver 52 (FIG. 34) flows through the space between the rear side panel 53 and the rear frame 151 into the opening 151a. Thus, the air inlets or air outlets of openings 182a, 134a, 151a are inside the double structure. Therefore, the soundproofing effect is high.

The inner cover 97 also includes the top cover 57 , the front frame side covers 73 and the radiator guard 111 . The radiator guard 111 is provided to protect the radiator 11 from foreign matter entering through the roof panel exhaust port 109 .

(base part)
FIG. 36 is a plan view showing the configuration of the base portion of the engine working machine according to the second embodiment of the present invention. Further, FIG. 37A is a BB cross-sectional view showing the configuration of the base portion of the engine working machine according to the second embodiment of the present invention, and FIG. It is the figure which looked at the base part from the back.

As with the base portion 30 (FIG. 5) of the first embodiment, the base portion 130 includes a base partition plate 31 (FIG. 36), end plates 32 (FIG. 37B) on both sides of the rear portion, and U-shaped U-shaped) members 134, 134, a substantially L-shaped member 36 (Fig. 37A), an air supply partition duct 137 (Figs. 37A and 39), and an air supply partition unit 40 (Fig. 9). . Further, the U-shaped member 134 has an opening 35 formed on the rear side surface thereof.

Further, the base portion 130 of the present embodiment includes base side members 105, 105 on both sides, and receiving members 131 for attaching the side members 105 and 105 are provided on the back sides of the end plates 32 at the four corners. An introduction plate 105f (FIG. 38C) is formed in the base side member 105, and an opening 105a (FIGS. 38B and 38C) is formed in the lower central portion in the front-rear direction. Further, as described above, the U-shaped member 134 is also different from the U-shaped member 34 (FIG. 7) of the first embodiment in that the opening 134a is formed in the front upper surface.

38A to 38C are perspective views showing the appearance of base side members used in the second embodiment of the present invention.
The base side member 105 is a plate material having a substantially L-shaped portion in cross section, and an extension portion 105c is formed at the end of the long side 105b of the L-shaped portion. In other words, the base side member 105 is formed in a substantially Z shape in cross section. The extending portion 105c is a portion attached to the upper surface of the U-shaped member 134 (FIGS. 35 and 40), and is formed with a plurality of screw holes 105d. An opening 105a (FIG. 38B) is formed in the center of the L-shaped portion on the short side 105e in the front-rear direction. The surface of the short side 105e of the L-shaped portion is inclined with respect to the surface of the long side 105b, and is visible from the side surface of the base portion 130 as shown in FIG. 37A.

A lead-in plate 105f is formed at the rear portion of the long side 105b of the base side member 105. As shown in FIG. A shielding plate 105g is formed on the front portion of the base side member 105 so as to be aligned with the position of the opening 134a. The shielding plate 105g allows the outside air supplied to the intake branch chamber 101 (FIGS. 32 and 33) to smoothly enter the opening 134a. Furthermore, on both sides of the opening 105a of the base side member 105, branch plates 105h, 105h are formed.

Figure 39 is a perspective view of an air supply partition duct used in the second embodiment of the present invention;
The air supply partition duct 137 corresponds to the air supply partition duct 37 (FIG. 8) of the first embodiment. The air supply partition duct 137 includes a flat plate 137a that is rectangular in plan view, an inner wall 137b that is U-shaped (substantially U-shaped) in plan view, and L-shaped side walls 137c that are connected to both ends of the inner wall 137b. 137c. A fixing portion 137d extends from the inner wall 137b and the side wall 137c. The inner wall 137b is composed of a central wall 137e and end walls 137f, 137f. The side wall 137c and the end walls 137f form first notches 139, 139, and the inner wall 137b has a second notch 138. As shown in FIG.

40 to 42 are explanatory diagrams explaining air flow in the base portion of the second embodiment of the present invention. Here, FIG. 41 shows the state of FIG. 40 with an air supply partition duct 137 (FIG. 39) added, and FIG. 42 shows the state of FIG. 37B) is added.

As shown in FIG. 40, a space is formed between the U-shaped member 134 and the base side member 105 . Outside air flows into this space from the opening 105 a of the base side member 105 . The outside air (air) that has flowed into the space rises between the branch plates 105h, 105h. The air rising between the branch plates 105h, 105h hits the upper surface of the U-shaped member 134 and branches in the longitudinal direction. That is, the space formed between the U-shaped member 134 and the base side member 105 functions as the intake branch chamber 101 (FIGS. 32 and 33). The forwardly branched air rises through the opening 134 a and flows into the second communication passage 6 ( FIG. 56 ), and the rearwardly branched air flows into the first air supply chamber 3 through the opening 35 .

As shown in FIG. 41, the air that has flowed into the first air supply chamber 3 (FIG. 40) through the opening 35 flows into both the first notch 139 and the second notch 138 of the air supply partition duct 137. and the air branched at each rises.

The air that has flowed into the second notch 138 (FIG. 41) passes through the second opening 43 of the air supply partition unit 40 and rises inside the rectangular tubular body (the guide plate 40b), as shown in FIG. Also, the air that has flowed into the first notch 139 rises through the first openings 42 , 42 of the air supply partition unit 40 . That is, the air supply partition duct 137 (FIGS. 39 and 41) divides the taken outside air into air rising inside the rectangular tube (the guide plate 40b) and air rising outside the guide plate 40b. .

(rear frame part)
43 and 44 are perspective views showing the appearance of the rear frame portion. 44 shows a state in which the top cover 57 is removed from FIG. 43. As shown in FIG.

The rear frame portion 150 includes a rear frame 151, a fan side cover 54 (FIG. 44), a rear cover 55, a rear door 58, an upper surface cover 57, and a control box 90 (FIG. 44), as in the first embodiment. and When the top cover 57 in FIG. 43 is removed, the control box 90 is exposed as shown in FIG. Here, the rear frame 151 is different from the rear frame 50 (FIG. 16) of the first embodiment in that openings 151a are formed on both sides and an inspection opening 151b is formed on the left side. . The inspection opening 151 b is closed with an inspection cover 153 .

45 is a cross-sectional view showing the inside of the rear frame portion 150, and FIGS. 46A and 46B are perspective views of the rear frame duct.
The rear frame portion 150 also differs from the rear frame 50 (FIG. 17) of the first embodiment in that it further has a rear frame duct 155 as a second duct. The rear frame duct 155 is a passage for taking outside air taken into the second air supply chamber 5 (FIG. 33) into the rear frame. As a result, outside air taken in by the louver 52 flows to the first electric fan 17 through the opening 151a and the first communication passage 4 (FIG. 54).

The rear frame duct 155 (FIGS. 46A and 46B) includes a plate member 155b having a U-shaped cross section, an inclined surface 155c, and a current plate 155a. The inclined surface 155c gradually raises the air taken in through the opening 151a. The rectifying plate 155a suppresses the generation of turbulence in the rising air.

47 is a perspective view of the rear cover duct ASSY, and FIGS. 48A and 48B are perspective views of the duct outside the rear cover.
The rear cover duct ASSY 157 includes a rear cover 55 (FIGS. 18(a) and 18(b)), a rear cover duct 59 (FIGS. 19(a) and 19(b)), and a rear cover outer duct 156. As shown in FIG. That is, the rear cover duct ASSY 157 is obtained by further attaching the rear cover outer duct 156 to the rear cover 55 (FIG. 20) to which the rear cover duct 59 is attached.

The rear cover outer duct 156 (FIGS. 48A and 48B) is box-shaped and attached to the rear cover 55 . The duct 156 outside the rear cover is formed with two rectangular openings 156a, 156a and a notch 156b. The openings 156a, 156a are portions for passing outside air taken in from the opening 59a (FIG. 20). The notch 156b is formed on the bottom surface.

(front frame part)
49A and 49B are perspective views showing the internal structure of the front frame portion.
The front frame portion 170 includes a front frame 171, front frame side covers 73, and front frame partition plates 75, 75, like the front frame 70 (FIG. 22) of the first embodiment. However, the front frame portion 170 does not have the front frame upper surface cover 79 (FIG. 22(b)) provided in the first embodiment.

An opening 171b is formed on the rear side of the front frame 171. As shown in FIG. The opening 171b is closed by in-flight guards 172 and 173. As shown in FIG. Air F33 (FIG. 59C) in the engine room 1 is taken into the muffler room 103 through the opening 171b. The in-flight guards 172 and 173 prevent objects that have been damaged in the in-flight from jumping out of the engine room 1 into the muffler room 103. - 特許庁It is also different from the first embodiment in that the muffler bracket 14 (FIG. 49B) is exposed.

FIG. 50 is a perspective view showing the internal structure of the front frame portion of the second embodiment of the invention.
The front frame 171 includes a U-shaped (substantially U-shaped) second air discharge passage 9 formed on each of the left and right sides, and a U-shaped first air discharge passage 8 formed only on the right side. . The second air discharge passage 9 communicates with a muffler chamber 103 (FIG. 51) through an opening 9a formed at the bottom. Further, the front frame 171 is formed with a partition plate inclined surface 171a, and the partition plate inclined surface 171a separates the muffler chamber 103 and the radiator chamber 104 from each other. A heat insulating material 127b is attached to the inner surface of the second exhaust passage 9 (inside the exhaust passage). An opening 171c and an inspection opening 171d are formed in the upper portion of the first air discharge passage 8. As shown in FIG.

FIG. 51 is a perspective view showing an arrangement state of the muffler according to the second embodiment of the present invention, and FIG. 52 is a side view of the front frame portion. FIG. 51 is a diagram showing a state in which the radiator 11, the second electric fan 18, the front frame partition plates 75, 75, and the heat insulating material 127b are removed from the front frame portion shown in FIG. 50, and the muffler 12 is attached. 51, the second electric fan mounting portion 171e formed on the front frame 171 is exposed.

An inlet pipe 12a and a tail pipe 12c are connected to the muffler 12 as in the first embodiment. The inlet pipe 12a is connected to the engine 10 via an exhaust pipe 12b. The inlet pipe 12a is laid in the second exhaust passage 9 through the right opening 9a. The exhaust pipe 12b is bent in an L-shape at the upper portion of the second air exhaust passage 9 and runs through the upper portion of the first air exhaust passage 8 substantially horizontally. The tail pipe 12c is laid in the second exhaust air passage 9 on the left side.

(Side door part)
The side door portion 60 (FIGS. 25 and 26) is the same as that of the first embodiment, and includes a door frame shield 62, two side door ducts 65, a front side door 63, a rear side door 64, and a trim seal. 66 (FIG. 26). 25 is included in the body portion 95 (FIG. 4), and the rear side panel 53 is included in the rear frame portion 150. As shown in FIG.

FIG. 53 is a configuration diagram showing the flow of cooling air in the engine working machine according to the second embodiment of the present invention. 54 and 55 are perspective views showing the flow of cooling air in the first air supply chamber according to the second embodiment of the invention.

Outside air (F31) that has flowed in through the opening 55a (see FIG. 18A) of the rear cover 55 rises between the rear cover 55 and the rear cover duct 59 through the notch 59b (FIG. 55). The rising air (F31) reaches between the rear cover duct 59 and the rear cover outer duct 156 through the opening 59a of the rear cover duct 59. That is, the outside air that has flowed in through the opening 55 a is supplied between the rear cover 55 and the rear cover external duct 156 . A space between the rear cover 55 and the duct 156 outside the rear cover is called a third air supply chamber 7 (FIG. 55).

The air supplied to the third air supply chamber 7 passes through the two openings 156a, 156a of the duct 156 outside the rear cover, and flows between the plate member 155b of the rear frame duct 155 and the guide plate 40b of the air supply partition unit 40. pass through. In other words, the air supplied to the third air supply chamber 7 passes between the rear cover 55 and the outside of the rectangular tubular body (guide plate 40b). Air that has flowed between the guide plate 40 b and the rear frame duct 155 is taken into the engine compartment 1 by the first electric fan 17 .

Also, outside air taken in between the rear side panel 53 (FIG. 34) and the rear frame 151 (FIG. 35) from the louver 52 flows into the opening 151a. The air taken in through the opening 151a (FIGS. 35, 43, and 44) rises along the inclined surface 155c of the rear frame duct 155 (F3). In other words, the air taken in through the opening 151 a is taken in between the rear cover 55 and the outside of the rectangular tubular body (guide plate 40 b ) and the generator 20 through the rear frame duct 155 . A space between the rear cover 55 and the outside of the rectangular tubular body (the guide plate 40b) and the generator 20 is called a first communication passage 4. As shown in FIG.

FIG. 56 is a configuration diagram showing the flow of cooling air in the engine working machine according to the second embodiment of the present invention.
The outside air (F0) flowing in from the opening 105a of the base side member 105 branches inside the intake branch chamber 101 into air (F13) heading for the opening 134a and air (F1) heading for the opening 35.

The air (F1) taken into the first air supply chamber 3 through the opening 35 branches at the first notch 139 and the second notch 138 of the air supply partition duct 137 (FIG. 41). The air that has passed through the first notch 139 passes through the first opening 42 of the air supply partition unit 40 (F11) and flows into the first communication passage 4 . On the other hand, the air that has passed through the second notch 138 passes through the rectangular tubular body (the guide plate 40b) (F12) and is taken into the intake port 20a of the generator 20 (FIG. 13(b)).

The air (F32) that has flowed into the first communication passage 4 is drawn into the engine compartment 1 by the first electric fan 17. As shown in FIG. The air that has flowed into the generator intake port of the generator 20 arranged in the engine room 1 is discharged to the engine room 1 from the generator discharge port.

Also, outside air (F21) taken in via the louver 52 passes through the two side door ducts 65 (second communication passages 6) (F22, F23). The air that has passed through the side door duct 65 flows between the front side panel 74 and the front frame side cover 73 (Fig. 57) (F24), and is directed to the second electric fan 18 (F25).

57 and 58 are perspective views showing how cooling air flows from the second communication passage to the second electric fan.
The air (F13) rising from the opening 134a flows into between the front side panel 74 (FIG. 56) and the front frame side cover 73 (second communication passage 6). As shown in FIG. 57, the air taken into the second communication passage 6 is either directly sucked into the second electric fan 18 (F25), or flows along the front frame front cover 76 and then flows through the second electric fan. It is sucked into the fan 18 (F24).

The air sucked into the second electric fan 18 flows into the radiator chamber 104, cools the radiator 11, and then rises along the partition plate inclined surface 171a and the partition plate 171f (F27). Also, the air in the radiator chamber 104 is taken into the first exhaust air passage 8 through the opening 171c. The air (F26) taken into the first exhaust air passage 8 rises while cooling the exhaust pipe 12b. Then, the air (F27) that has risen along the partition plate inclined surface 171a and the partition plate 171f and the air (F26) that has risen through the first exhaust air passage 8 join again and are discharged from the roof panel exhaust port 109 to the outside of the aircraft. discharged to

59A, 59B, and 59C are perspective views showing how the air in the engine room and the engine device is exhausted.
In FIG. 59A, the air (F33) in the engine compartment 1 cools the muffler 12 in the muffler compartment 103, then flows (F34) along the back surface of the front frame front cover 76 (FIG. 59B), opening 9a and the second It rises through the air exhaust passage 9 . The air that has risen through the second exhaust air passage 9 is discharged outside the aircraft through the roof panel exhaust port 109 .

FIG. 60 is a perspective view showing the back surface of the roof panel of the second embodiment of the invention. Note that the surface is shown in the external view of FIG.
As described above, the roof panel portion of the decorative panel 110 is composed of the rear roof panel 106 , the center roof panel 107 and the front roof panel 108 . A rectangular roof panel exhaust port 109 is formed in the front roof panel 108 . Openings 106a, 106a are formed on both sides of the rear frame panel 106. As shown in FIG.

(Modification)
The present invention is not limited to the above-described embodiments, and various modifications such as those described below are possible.
(1) Although the muffler 12 and the radiator 11 are arranged in the engine device room 2 of the first embodiment, either one of the muffler 12 and the radiator 11 may be arranged.
(2) In the first and second embodiments, the second air supply chamber 5 is arranged in the rear part of the housing, and the second electric fan 18 is arranged in the front part of the housing. 5 may be arranged in the front part of the housing, and the second electric fan 18 may be arranged in the rear part of the housing. That is, the second air supply chamber 5 is arranged in one of the front and rear parts of the housing, and the second electric fan 18 is arranged in the other of the front and rear parts.

1 engine room 2 engine device room (engine device section)
3 first air supply chamber 4 first communication passage 5 second air supply chamber 6 second communication passage 7 third air supply chamber 8 first air exhaust passage 9 second air exhaust passage 15 third communication passage 10 engine 11 radiator ( Cooler)
12 muffler (muffler)
17 first electric fan 18 second electric fan 20 generator (working machine)
30, 130 base portion 34, 134 U-shaped member (first air supply portion box member)
35 opening 36 substantially L-shaped member (first air supply section box member)
37, 137 Air supply partition duct 40 Air supply partition unit 40a Flat plate (first air supply section box member)
40b guide plate (rectangular tubular body, third communication passage)
45 guide part (air introduction part)
50, 150 rear frame portion 51, 151 rear frame 52 louver (second air supply chamber)
53 rear side panel 58 rear door 59 rear cover duct 60 side door portion 61 door frame 62 door frame shield 65 side door duct 70, 170 front frame portion 71, 171 front frame 81 roof panel exhaust port 95 body portion 100, 200 engine working machine 101 intake Branch room (first duct, base side duct)
102 engine unit 103 muffler chamber 104 radiator chamber 105 base side member 105a opening 107 center roof panel 108 front roof panel 109 roof panel exhaust port 110 decorative cover 134a opening 155 rear frame duct (second duct)
156 rear cover outer duct 156a opening 171a partition plate inclined surface

Claims (7)

An engine working machine which is divided into an engine compartment in which an engine is installed and an engine equipment section in which either one or both of a muffler for eliminating exhaust noise of the engine and a radiator for cooling the engine are installed. hand,
The engine device section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged,
a first communication passage communicating between a first air supply chamber into which outside air is taken and the engine chamber;
a second communication passage that communicates between a second air supply chamber into which outside air is taken and the engine device section;
a first electric fan for sending air in the first communication passage to the engine room;
a second electric fan for sending the air in the second communication passage to the engine unit;
A first duct disposed on the side surface of the housing for sending outside air to the first air supply chamber and the second communication path,
Air in the engine room is discharged through the muffler room
An engine working machine characterized by: An engine working machine which is divided into an engine compartment in which an engine is installed and an engine equipment section in which either one or both of a muffler for eliminating exhaust noise of the engine and a radiator for cooling the engine are installed. hand,
The engine device section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged,
a first communication passage communicating between a first air supply chamber into which outside air is taken and the engine chamber;
a second communication passage that communicates between a second air supply chamber into which outside air is taken and the engine device section;
a first electric fan for sending air in the first communication passage to the engine room;
a second electric fan for sending the air in the second communication passage to the engine unit;
with
exhausting the air in the engine room through the muffler room;
The engine working machine, wherein the second air supply chamber includes a second duct that communicates with the first communication passage. a first exhaust passage for exhausting the air sent into the radiator chamber;
3. The engine work according to claim 2 , further comprising a second exhaust passage different from the first exhaust passage for exhausting the air sent into the engine chamber through the muffler chamber. machine. An engine working machine which is divided into an engine compartment in which an engine is installed and an engine equipment section in which either one or both of a muffler for eliminating exhaust noise of the engine and a radiator for cooling the engine are installed. hand,
The engine device section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged,
a first communication passage communicating between a first air supply chamber into which outside air is taken and the engine chamber;
a second communication passage that communicates between a second air supply chamber into which outside air is taken and the engine device section;
a first electric fan for sending air in the first communication passage to the engine room;
a second electric fan for sending the air in the second communication passage to the engine unit;
a first duct disposed on a side surface of the housing for feeding outside air into the first air supply chamber and the second communication passage;
a first exhaust passage for exhausting the air sent into the radiator chamber;
a second exhaust passage for exhausting the air sent into the engine chamber through the muffler chamber;
The second air supply chamber includes a second duct that communicates with the first communication passage,
The first exhaust passage exhausts part of the air sent into the radiator chamber,
The engine working machine, further comprising an exhaust port for exhausting the air discharged from the first exhaust passage and the rest of the air sent into the radiator chamber. An engine working machine which is divided into an engine compartment in which an engine is arranged, and an engine device section in which one or both of a muffler for eliminating exhaust noise of the engine and a radiator for cooling the engine are arranged. ,
The engine device section is divided into a radiator chamber in which the radiator is arranged and a muffler chamber in which the muffler is arranged,
a first communication passage communicating between a first air supply chamber into which outside air is taken and the engine chamber;
a second communication passage communicating between a second air supply chamber into which outside air is taken and the muffler chamber;
a first electric fan for sending air in the first communication passage to the engine room;
a second electric fan for sending the air in the second communication passage to the engine unit,
The engine working machine, wherein the second communication passage is separated from the first communication passage. A work machine interlocking with the engine is further disposed in the engine room,
6. The engine working machine according to claim 5 , further comprising a third communication passage that communicates between the first air supply chamber and an intake port of the working machine. Further comprising a housing having an opening and closing door on the side wall,
The second air supply chamber is arranged in one of the front and rear parts of the housing,
The second electric fan is arranged at the other of the front and rear parts,
2. The engine working machine according to claim 1 , wherein the second communication path is formed on an inner surface of the opening/closing door.

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