JP2019044586A - Engine work machine - Google Patents

Abstract

To provide an engine work machine which achieves further improvement of soundproof effect.SOLUTION: An engine work machine 1 includes: an engine 33; a work machine WM which is operated by driving force of the engine 33; and a case body 10 which houses the engine 33 and the work machine WM. The case body 10 includes: an engine room R3 which houses the engine 33; a work machine room R2 which houses at least a part of the work machine WM; an air supply room R1 into which outer air flows; a first communication passage which allows communication between the air supply room R1 and the work machine room R2 and is located in a center part as seen in a width direction; and a second communication passage which allows communication between the work machine room R2 and the engine room R3 and is located in a center part as seen in the width direction. The engine work machine includes a passage in which outer air flows through the air supply room R1, the first communication passage, the work machine room R2, the second communication passage, and the engine room R3 in a written order. In the air supply room R1, a first electric fan F1 is provided. In the work machine room R2, a second electric fan F2 is provided.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an engine work machine.

DESCRIPTION OF RELATED ART Conventionally, as an engine working machine, as a low noise and highly efficient thing, the package-type electric power generating apparatus described, for example in patent document 1 is known. The package-type generator eliminates the radiator fan and installs an alternative electric fan on the air supply side of the generator.
By doing this, the device eliminates the noise part of the radiator fan, and further uniformly distributes the cooling air to the radiator by the electric fan located at a distance from the radiator, thereby achieving low noise and high efficiency. I am trying. Moreover, the package-type power generation device is intended to reduce the noise by using a sound barrier construction package.

JP, 2004-144054, A (FIG. 1, FIG. 3 and FIG. 4)

  However, in the package-type power generation device of Patent Document 1, outside air is taken into the package by one electric fan installed near the air inlet at the upper end of the package. For this reason, the package type power generation apparatus has a problem that the noise in the vicinity of the intake port is large.

  Then, this invention makes it a subject to provide the engine working machine which improved the soundproof effect further.

  As means for solving the above problems, an engine work machine according to the present invention includes an engine, a work machine operated by the driving force of the engine, and a case body accommodating the engine and the work machine. The case body includes an engine room for accommodating the engine, a work machine room for accommodating at least a part of the work machine, an air supply room into which the outside air flows, the air supply room, and the work machine room , And a second communication passage communicating the work machine chamber with the engine chamber and located at the central portion in the width direction, and the air supply chamber A flow path through which ambient air flows in the order of the first communication passage, the work machine chamber, the second communication passage, and the engine chamber, and a first electric fan is provided in the air supply chamber; Is characterized in that a second electric fan is provided.

According to this configuration, the flow path through which the outside air in the engine work machine flows connects the air supply chamber and the work machine room, and the first communication path located at the center in the width direction, the work machine room and the engine room By providing a second communication passage communicating with and located at a central portion in the width direction, the outside air is supplied to a position where the engine working machine enters from the outside to the inside. For this reason, the sound of the first and second electric fans generated in the flow path and the sound of the outside air are unlikely to leak to the outside of the engine working machine, and the soundproof effect can be improved.
Further, in the flow path, two electric fans of a first electric fan and a second electric fan are provided. For this reason, the outside air flowing in the flow path can smoothly flow in the flow path, so that the cooling effect can be improved.

  Further, the first communication passage is formed on a first partition plate which divides the air supply chamber and the working machine chamber, the first electric fan is fixed to the first partition plate, and the second communication passage is formed. Is formed on a second partition plate that partitions the working machine chamber and the engine chamber, the second electric fan is fixed to the second partition plate, and the first electric fan and the second electric fan are Preferably, they are installed in series with the flow path.

  According to this configuration, since two electric fans are installed in series with respect to the flow path, the wind pressure of the outside air flowing in the flow path is increased, and the cooling effect is improved.

  Further, the electrical component storage box forming the work machine room includes an electrical component storage inner box forming the inner wall of the work machine room, and an electrical component storage outer box installed over the electrical component storage inner box. It is preferable that a space communicating with the air supply chamber is formed between the electric component storage inner box and the electric component storage outer box.

  According to this configuration, since the electric component storage box has the electric component storage inner box and the electric component storage outer box and has a double structure, the soundproof effect and the heat insulation effect can be improved. Further, a space communicating with the air supply chamber is formed between the electric component storage inner box and the electric component storage outer box, so that a ventilation path of the outside air flowing to the air supply chamber can be formed. For this reason, since a long ventilation path can be formed, the soundproof effect can be improved.

  Preferably, the engine storage box forming the engine compartment has a center frame, and has a double-layered structure with a roof cover placed on the outside of the center frame.

  According to this configuration, the engine storage box has a double structure in which the roof cover is placed on the outside of the engine storage box, so that the soundproof effect and the heat insulating effect can be improved.

  The present invention can provide an engine work machine with a further improved soundproof effect.

It is a perspective view showing an example of an engine work machine concerning an embodiment of the present invention. It is a front view of an engine work machine. It is a left view of an engine work machine. It is a top view of an engine work machine. It is a perspective view of a base. It is a perspective view which shows the installation state of a 1st electric fan and a 2nd electric fan. It is a perspective view of the 1st partition which shows the arrangement | positioning state of an opening part, a vent, and a communicating port. (A) is a top view of a base cover, (b) is a front view of a base cover, (c) is a left view of a base cover. It is a perspective view of a center frame. It is a perspective view which shows the installation state of an electrical component flame | frame and a center frame. It is a perspective view of the electrical component frame which shows the installation state of a control panel. It is a principal part schematic plan view which shows the installation state of the trim seal installed in the electrical component flame | frame. It is a perspective view which shows the state when the electrical component storage outer case is covered on the electrical component storage inside box. It is a perspective view which shows the electrical component storage outer case of the state which attached the rear door. It is a perspective view which shows the electrical component storage outer case put on the electrical component storage inside box.

Hereinafter, based on FIGS. 1-15, an example of the engine working machine which concerns on embodiment of this invention is demonstrated.
The direction in which the front door 35 of the engine work machine 1 shown in FIG. 1 is "front", the opposite of the front door 35 is "rear", the vertically upper side is "upper", the vertically lower side is "lower", electrical components The width direction with the storage box 4 will be described as “left”, and the width direction with the muffler storage box 5 as “right”.

«Engine work machine»
The engine work machine 1 shown in FIG. 1 is a power supply device including a rectangular box-shaped case body 10 and housing the work machine WM (see FIG. 2) driven by the engine in the case body 10.
The case body 10 of the engine work machine 1 has a base 2 as a base, an engine storage box 3 mounted at the center in the left-right direction on the base 2, and an electrical component storage box arranged on the left side of the engine storage box 3 4 and the muffler storage box 5 disposed on the right side of the engine storage box 3 are integrally provided. As shown in FIG. 2, the sizes of the electrical component storage box 4 and the muffler storage box 5 in the left-right direction are approximately half that of the engine storage box 3.

As shown in FIG. 2, the base 2 is formed with an air supply chamber R1 accommodating the first electric fan F1 and a fuel tank chamber R5 accommodating the fuel tank T1 and the environmental tank T2. The left side surface of the base 2 is formed with a first intake port 2a for taking in the outside air.
In the electrical component storage box 4, a work machine room R2 for housing the second electric fan F2, the control box 43, and the like is formed. A louver 48 (second intake port) and a gap 4b are provided on the front and rear side surfaces of the electrical component storage box 4 for taking outside air into the air supply chamber R1 and the working machine chamber R2.
In the engine storage box 3, an engine room R3 for storing the engine 33, the radiator 34 and the like is formed. On the left (upstream) side of the engine storage box 3, a second electric fan installation port 30b for installing the second electric fan F2 and taking in the air in the working machine room R2 is provided. On the right (downstream) side of the engine storage box 3, a radiator installation opening 31b (see FIG. 9) for installing a radiator 34 to which air in the engine room R3 is fed is provided.
In the muffler storage box 5, a muffler chamber R4 for accommodating the first muffler M1, the second muffler M2, the sound insulation plate 53 and the like is formed.
Hereinafter, the base 2, the engine storage box 3, the electric component storage box 4, the muffler storage box 5, and the flow path of the outside air sucked and discharged into the case body 10 will be mainly described in more detail.

«Base, base outer box»
As shown in FIG. 2, the base 2 is formed of a metal base outer case 21, a first partition plate 24, a second partition plate 11, a base cover 25 and a muffler chamber bottom plate 26. (See FIGS. 5 and 6).

  The base outer case 21 is a rectangular rectangular component having a top opening and a plan view. The base outer box 21 includes a base lower end surface 21a forming a lower surface, a base front panel 21b forming a front surface, a base rear panel 21c forming a rear surface, base side panels 21d and 21e forming left and right sides, and an upper surface The first partition plate 24, the base cover 25, the muffler chamber bottom plate 26, and the base flange portion 21f formed on the periphery of the opening are formed (see FIG. 3). The ceiling surface of the air supply chamber R1 of the base outer box 21 is closed by a first partition plate 24 provided with a first electric fan F1. In the base outer box 21, the ceiling surface above the fuel tank T1 of the fuel tank chamber R5 is closed by the base cover 25 with the left and right gaps 2c interposed therebetween. In the base outer box 21, the ceiling surface above the environmental tank T2 is closed by the base cover 25 with the gap 2c interposed.

  The second partition plate 11 vertically connects the base partition plate portion 11 a that divides the inside of the base outer case 21 into left and right, and the extension portion 11 b that extends upward from the upper portion of the base outer case 21. It consists of a board member. The inside of the base 2 is divided by the base partition plate portion 11a at the lower part of the second partition plate 11 into two chambers of the air supply chamber R1 on the left side and the fuel tank chamber R5 on the right side. In the base outer case 21, the second partition plate 11 is extended from the right end of the first partition plate 24 to the base lower end surface 21a to constitute a partition plate (see FIG. 5).

  As shown in FIG. 2, the first partition plate 24 is a plate member that divides the air supply chamber R1 and the working machine chamber R2. As shown in FIGS. 5, 6 and 7, the first partition plate 24 is formed with a first electric fan installation port 24 a for installing the first electric fan F <b> 1 at the center. A vent 24 b is formed at the front end of the front side of the installation location where the electrical component storage inner box 41 is mounted on the first partition plate 24. Further, as shown in FIG. 7, the space between the front end of the first partition 24 on which the electric component storage inner box 41 is mounted and the inner wall of the base front panel 21b, the rear end of the first partition 24 and the rear of the base The communication port 2b is formed in two places between the inner wall of the panel 21c, respectively. Therefore, the air supply chamber R1 and the working machine chamber R2 are in communication with each other by the first electric fan installation port 24a, the vent 24b, and the communication port 2b (see FIGS. 2 and 3).

  As shown in FIG. 2, the first electric fan F1 sucks the outside air into the air supply chamber R1 from the first air inlet 2a and the louver 48 (second air inlet), and the working machine above the air supply chamber R1 It is a blower for sending the outside air into the room R2. The first electric fan F1 is detachably attached so as to blow air upward to the first electric fan installation port 24a on the lower surface of the horizontal first partition plate 24 forming the ceiling surface of the air supply chamber R1. For this reason, the first electric fan F1 can be replaced by removing the base floor plate 22.

<Air supply chamber>
The air supply chamber R1 is mainly formed by providing the base outer box 21 with the second partition plate 11 and the first partition plate 24. In the air supply chamber R1, all the wall surfaces are formed by the base floor plate 22, the base side surface panel 21d, the base partition plate portion 11a, the base front panel 21b, the base rear panel 21c, and the first partition plate 24. (See Figure 3). In the air supply chamber R1, the first air inlet 2a where outside air enters, the air vent 24b and the communication port 2b (see FIG. 3) where air in the electrical component storage box 4 enters, and the air in the air supply chamber R1 work A hole is formed of the first electric fan installation port 24a that flows into the cabin R2.

The first air inlet 2a is formed of a plurality of through holes formed in a row in a row in the left side base side panel 21d (see FIG. 6). A base duct 23 for preventing rainwater intrusion and having an open upper end portion is joined to the air supply chamber R1 side of the first air inlet 2a of the base side panel 21d. Outside air is drawn into the air supply chamber R1 from the first air inlet 2a, and the outside air entering the electrical component storage case 42 flows into the air supply chamber R1 via the communication port 2b and the air vent 24b. The flow path is formed.
The communication port 2b is an outer wall of the electric component storage inner box 41, a base front panel 21b disposed on the outer periphery of the electric component storage inner box 41, and an inner wall of a base rear panel 21c on the first partition plate 24; And, it is formed in the lower part of the space between the inner wall of the electrical component storage case 42.

<Fuel tank room>
The fuel tank chamber R5 shown in FIG. 5 includes a base front panel 21b, a base rear panel 21c, a base partition plate portion 11a, a muffler chamber partition plate portion 26a extended above the muffler chamber bottom plate 26, and a base cover And 25 (see FIG. 2).
As shown in FIG. 2, in the fuel tank chamber R5, a fuel tank T1 for containing fuel is provided at a position near the left side, and an environmental tank T2 for containing leaked fuel etc. is at a position near the right side. It is set up. The base front panel 21b forming the front wall of the fuel tank chamber R5 includes an oil drain 27 for oil discharge, a fuel supply port 28a for fuel supply when connected to an external fuel tank, and a fuel discharge for fuel discharge. An outlet 28 b and a cooling water drain 29 a for discarding the cooling water are provided. As shown in FIG. 5, a fuel drain 29b for discharging the fuel and an environment-based drain 29c are provided on the base side panel 21e on the right side.

  As shown in FIG. 2, the base cover 25 that forms the ceiling surface of the fuel tank chamber R5 also forms the bottom surface of an engine chamber R3 described later. For this reason, the base cover 25 has a function of suppressing the sound of the engine 33 from leaking from the lower surface of the engine room R3 to the lower side of the fuel tank room R5. Further, a gap 2c is formed between the base cover 25 and the center frame 31 of the engine storage box 3 for dropping the oil dropped to the lower surface of the engine compartment R3 into the environmental tank T2.

«Electric parts storage box»
As shown in FIGS. 13 and 15, the electrical component storage box 4 has a double structure by the electrical component storage inner box 41 and the electrical component storage outer box 42 covered with the electrical component storage inner box 41. Is formed. In the electric component storage box 4, the inner wall surface of the electric component storage inner box 41 below the installation position of the control panel 45 and the internal inspection cover 44 shown in FIG. 11 and the electric component storage outer box 42 shown in FIG. A thick plate-like sound absorbing material (not shown) is adhered to the entire inner wall surface. Therefore, the electrical component storage box 4 is a soundproof (sound insulation) case.

  As shown in FIG. 10, the electric component storage inner box 41 is formed of an inverted L-shaped frame member in a central longitudinal section in which the lower surface and the right side are opened. The lower part of the electric component storage inner box 41 is placed on the first partition plate 24 (see FIG. 7) in the base 2 and installed so as to enter the base 2. Therefore, the lower opening of the electric component storage inner box 41 is closed by the first partition plate 24 having the first electric fan installation port 24a formed of a substantially square through hole. A rectangular fan main body of the first electric fan F1 is installed in the first electric fan installation port 24a. The first electric fan F1 is a blower for blowing the air in the air supply chamber R1 into the working chamber R2. A circular first communication port F1a (first communication path) is formed in the fan body of the first electric fan F1, and a blade (not shown) is rotatable in the first communication port F1a (first communication path). Is located in Therefore, the inside of the air supply chamber R1 and the inside of the electric component storage inner box 41 communicate with each other through the first communication port F1a, and the air in the air supply chamber R1 flows into the electric component storage inner box 41.

  The front-rear width of the electric component storage inner box 41 is formed to be the same length as the first partition plate 24 on which the electric component storage inner box 41 is mounted. The electrical component storage inner box 41 is fixed in a state in which the right opening is in contact with the second partition plate 11, and the left end is disposed to the front of the vent 24b. Therefore, the inside of the electrical component storage inner box 41 does not communicate with the air supply chamber R1 through the communication port 2b and the vent 24b.

  As shown in FIG. 10 or 11, the electrical component storage inner box 41 is formed with an inspection cover installation port 41a and a control panel installation opening 41b. On the left side of the electrical component storage inner box 41, a rectangular frame shaped convex portion 46a of the electrical component frame 46 and a box-like output terminal cover 47 in which the output terminals are disposed are provided. The inspection cover installation port 41 a is closed by the internal inspection cover 44.

  As shown in FIG. 12, the base end of a rubber trim seal TS is fitted around the entire circumference of the tip of the frame-shaped convex portion 46a. The tip portion of the trim seal TS is formed in a hollow shape so as to be elastically deformed to a crushed state when pressed. The front end portion of the trim seal TS is a side of the side door 40 provided on the left side surface of the electric component storage outer box 42 so as to be openable and closable when the electric component storage outer box 42 is put on the electric component storage inner box 41. By hitting the back side of the door 40a, it is pressed and smashed to maintain a sealed state, thereby suppressing the entry of rainwater into the electrical component storage box 4.

  As shown in FIG. 15, the electrical component storage case 42 is formed of a frame member having an inverted L shape in a central longitudinal section in which the lower surface and the right side are open. Further, in the electric component storage outer case 42, louver installation ports 42b on the front and rear surfaces and a side door installation opening 42c (see FIG. 14) on the left side surface are formed.

A louver 48 (second intake port) is provided at the front and rear louver installation ports 42b, in which a large number of elongated thin plate swash plates extending in the horizontal direction are obliquely disposed outward and downward via an appropriate interval. There is. The louver 48 is in communication with the air supply chamber R1 from the space 4a between the electric component storage inner box 41 and the electric component storage outer box 42 through the communication port 2b and the ventilation port 24b.
As shown in FIG. 14, a side door 40 is provided in the side door installation opening 42 c. A horizontally long gap 4 b is formed between the lower side edge of the side door installation opening 42 c and the lower side edge of the side door 40 and is not sealed.

  As shown in FIG. 13, the electrical component storage case 42 is bolted to the front and rear base flange portions 21 f of the left side portion of the base 2. In the electrical component storage box 4, a space 4 a is formed between the outer wall of the electrical component storage inner box 41 and the inner wall of the electrical component storage outer box 42. As shown in FIG. 10, the space 4a is substantially C-shaped in a plan view, and is formed around the front side, the left side and the rear side of the electric component storage inner box 41. The space 4a is a supply passage for supplying the outside air sucked into the electric component housing outer case 42 from the louver 48 (second intake port) to the air supply chamber R1 through the communication port 2b and the ventilation port 24b. .

<Working machine room>
In the work machine room R2, as shown in FIG. 6, a part (left end) of the work machine WM, a second electric fan F2, and a control box 43 (see FIG. 11) are disposed. The work machine room R2 and the engine room R3 are partitioned by the second partition plate 11 (see FIG. 9).

«Engine storage box, engine room»
As shown in FIG. 2, the engine storage box 3 has a substantially cubic shape and is a box that forms an outer shell of the engine room R3. The engine storage box 3 has a double structure including a center frame 31 (see FIG. 9) that functions as an inner box of the engine storage box 3 and a roof cover 32 disposed on the outside of the center frame 31. ing. In the center frame 31 and the roof cover 32, a thick plate-like sound absorbing material (not shown) is adhered to the inner wall surfaces of the center frame 31 and the roof cover 32, thereby making the engine storage box 3 soundproof.

  The engine storage box 3 forms a left side surface, a center frame 31, a roof cover 32, a base cover 25 which forms a bottom surface, a front door 35 which forms a front surface, a rear panel (not shown) which forms a rear surface. It is formed by the extension part 11b of the left wall 30 and the 2nd partition plate 11, and the radiator 34 which forms a right side. In the engine storage box 3, the right end portion of the work implement WM, the engine 33, the radiator 34, the dual resonator 37, and the air cleaner 38 are disposed (see FIG. 6).

  As shown in FIG. 9, the center frame 31 has a door opening 31a formed on the front side, a left wall installation port (not shown) formed on the left, and a radiator installation opening 31b formed on the right. , And the lower side is an open box. The center frame 31 is mounted on the front and rear base flanges 21f. The lower opening of the center frame 31 is closed by the base cover 25 with the left and right gaps 2c interposed therebetween. The top side of the center frame 31 is covered by a roof cover 32. A left wall installation port (not shown) of the center frame 31 is closed by the left wall 30 and the extending portion 11 b of the second partition plate 11.

  In addition, the left wall 30 and the extension part 11b of the 2nd partition plate 11 may be integrally formed by one member. Therefore, in the embodiment, the case where the second electric fan F2 is fixed to the second electric fan installation port 30b of the left wall 30 is described as an example, but the extension part 11b of the second partition plate 11 is The second electric fan installation port 30 b may be provided in the second partition plate 11 by extending to the upper end portion of the center frame 31. That is, the left wall portion of the center frame 31 may be disposed as one member including the second partition plate 11 or the left wall 30 so as to form the entire left wall portion.

  The left wall 30 is a plate member that forms the left side wall of the center frame 31. In the left wall 30, a semicircular cutout 30a and a second electric fan installation port 30b are formed. Under the left wall 30, an extension 11b extending from the base partition 11a to the upper side of the base 2 is disposed. The left wall 30 and the extension portion 11b abut on the electric component storage inner box 41 and the electric component storage outer box 42, and close the opening on the right side of the electric component storage inner box 41 and the electric component storage outer box 42. Therefore, the internal space of the electrical component storage inner box 41 and the space 4a (see FIG. 10) do not communicate with the engine room R3.

  At the upper center of the left wall 30, a second electric fan installation port 30b formed of a substantially square through hole is formed. A rectangular fan main body of the second electric fan F2 is installed in the second electric fan installation port 30b. A circular second communication port F2a (second communication path) is formed in the fan body, and a blade F2b is rotatably disposed in the second communication port F2a. The second electric fan F2 is a blower for blowing the air in the work implement room R2 into the engine room R3. Therefore, the air in the electrical component storage inner box 41 flows into the center frame 31.

The notch 30a forms a circular hole integrally with the notch 11c of the extension 11b. In the hole, a working machine WM connected to the engine 33 and supported by anti-vibration rubber (not shown) in the engine room R3 penetrates. A trim seal (not shown) is fitted around the entire inner periphery of the hole to protect the work implement WM from the hole end. Therefore, the hole is closed by the work implement WM and a trim seal (not shown).
The work machine WM is a machine driven by the engine 33, and is, for example, a generator. The work machine WM shown in FIG. 6 has a blower installed therein. For this reason, the work machine WM performs the function of the third fan. In the work machine WM, the air intake port WMa is disposed in the work machine room R2, and the discharge port WMb is disposed in the engine room R3.

The door opening 31 a is closed by the front door 35.
The front door 35 is a soundproof double door for opening and closing the door opening 31a provided with a sealing material (not shown). The front door 35 includes a front door main body 35a, a front door back plate (not shown) provided inside the front door main body 35a and to which a thick sound absorbing material is adhered, and a handle for opening and closing the front door 35. And a device 35b. The front door 35 is pivotally supported by the center frame 31 so as to be moved parallel to the door opening 31a by the four-bar link mechanism 36 (support arm 36a and auxiliary arm 36b) to open and close the door opening 31a. .

  A radiator 34 is disposed in the radiator installation opening 31 b formed on the right side surface of the center frame 31. Thus, the engine chamber R3 and the muffler chamber R4 communicate with each other through the radiator installation opening 31b. Further, the gas passing through the radiator installation opening 31 b exchanges heat with the water in the radiator 34 to cool by passing through the radiator 34. A cooling water inlet 39 (see FIG. 1) is provided at the top of the case body 10 above the radiator 34.

«Muffla storage box, Muffler room»
As shown in FIG. 2, the muffler storage box 5 is a housing that forms a muffler chamber R4. The muffler storage box 5 is formed of a metal frame member having an inverted L-shape in a central longitudinal section in which the lower surface and the left side are opened. In the muffler storage box 5, a thick plate-like sound absorbing material (not shown) is adhered to the entire inner wall surface to form a soundproof case. The muffler storage box 5 is installed on a base flange portion 21 f (see FIGS. 5 and 6).

The left end of the muffler storage box 5 is disposed in contact with the right end of the center frame 31. The radiator 34 is provided at the left opening of the muffler storage box 5 via an exhaust air guide 51. The lower opening of the muffler storage box 5 is closed by a muffler chamber bottom plate 26. A wind guide plate 54 is provided at the upper opening of the muffler storage box 5.
In the muffler storage box 5, a first muffler M1, a second muffler M2 disposed above the first muffler M1, an exhaust pipe 52 extended upward from the second muffler M2, and an upper portion are provided. The sound insulation board 53 and the air guide board 54 are provided.
As shown in FIG. 1, an exhaust port 5 a for exhausting the air in the muffler chamber R 4 to the atmosphere, and an exhaust gas port 52 a of the exhaust pipe 52 are disposed on the upper surface of the muffler storage box 5.

«Function»
Next, the operation of the engine work machine 1 according to the embodiment of the present invention will be described with reference to the respective parts while mainly referring to FIGS. 2 and 3.

Outside air does not flow inside the case body 10 shown in FIGS. 2 and 3 when the first and second electric fans F1, F2 are OFF. The power switch of the control panel 45 (see FIG. 14) is turned on to drive the first and second electric fans F1, F2, the work machine WM, and the engine 33.
Then, as for the air in the case body 10, the first electric fan F1 blows the air in the air supply room R1 to the inside of the work machine room R2, and the second electric fan F2 and the fan in the work machine WM work machine The air in the chamber R2 is blown to the inside of the engine room R3 and the inside of the air supply room R1 and the working machine room R2 becomes negative pressure, so it flows.

  The air supply chamber R1 is supplied with the outside air (A1) sucked from the first air inlet 2a and the louvers 48 (second air inlet) on the front and back sides of the electrical component storage box 4 via the air vent 24b and the communication port 2b. The outside air (A2, A3) flowing into the air chamber R1 is sucked by the first and second electric fans F1, F2. The outside air (A4, A5) in the air supply chamber R1 is sent into the working machine room R2 by the first electric fan F1, and is sucked into the working machine room R2 by the second electric fan F2 and the fan in the working machine WM. Be done.

  In addition, as shown in FIG. 2, outside air (A 6) sucked from the gap 4 b between the side door 40 and the electric component storage case 42 by the first electric fan F 1 in the work machine room R 2 is the control panel 45. It flows in through the control box 43 from the contact surface of the control panel installation opening 41b and the clearance of the attachment part of the electrical component. The outside air (A4, A6) in the working machine room R2 is sucked by the second electric fan F2 and sent into the engine room R3 to cool the engine 33. The outside air (A5) in the work machine room R2 is sucked into the work machine WM by the fan in the work machine WM to cool the work machine WM.

  The outside air (A7) for cooling the engine 33 and the outside air (A8) for cooling the work machine WM are sent to the radiator 34 by the second electric fan F2 and the fan in the work machine WM to cool the cooling water, It is sent into the muffler room R4. The outside air (A9) in the muffler chamber R4 is pushed out from the air outlet 5a into the atmosphere by the second electric fan F2 and the fan in the work machine WM after cooling the first muffler M1 and the second muffler M2 in a double system. Are discharged in the same way.

In this case, the engine 33, the work machine WM operated by the driving force of the engine 33, and the case body 10 accommodating the engine 33 and the work machine WM are provided. The case body 10 has an engine compartment R3 accommodating the engine 33. And, work machine room R2 which accommodates at least a part of work machine WM, air supply room R1 where outside air flows in, air supply room R1 and work machine room R2 are communicated and the position in the width direction central part A first communication passage (first communication opening F1a), and a second communication passage (second communication opening F2a) which communicates the work machine chamber R2 with the engine chamber R3 and is located at the center in the width direction, A flow path (A1 to A9) through which the outside air flows in the order of the air supply chamber R1, the first communication passage, the working machine chamber R2, the second communication passage, and the engine chamber R3 is provided. A fan F1 is provided, and a second electric fan F2 is provided in the work machine room R2. To have.
As described above, the engine working machine 1 is configured such that the outside air flows at a position where the flow path through which the outside air flows enters the inside from the outside of the engine working machine 1. For this reason, the sound of the electric fan generated in the flow path and the sound of the outside air are unlikely to leak out of the engine work machine 1, and the soundproof effect can be improved. In addition, two electric fans of the first electric fan F1 and the second electric fan F2 are provided in the flow path, so that the outside air can smoothly flow in the flow path, so that the cooling effect can be reduced. It can be improved. Further, since the engine work machine 1 is not provided with the conventionally used engine fan, wind noise caused by the engine fan can be eliminated to make the work machine quiet.

In addition, the first communication passage (first communication port F1a) is formed in the first partition plate 24 that divides the air supply chamber R1 and the work machine chamber R2, and the first electric fan F1 is installed in the first partition plate 24. The second communication passage (the second communication port F2a) is formed in the second partition plate 11 or the left wall 30 that divides the working machine chamber R2 and the engine chamber R3, and the second electric fan F2 is the second partition plate The first electric fan F1 and the second electric fan F2 are installed in series with the flow path.
As described above, the first electric fan F1 and the second electric fan F2 can increase the wind pressure of the outside air flowing in the flow path by installing two electric fans in series with the flow path. Therefore, the cooling effect can be improved.
In addition to the second electric fan F2, a work machine WM internally provided with a fan is disposed in the flow path between the work machine room R2 and the engine room R3, and the flow path is partially formed in parallel It is done. For this reason, the air in the working machine room R2 can easily flow into the engine room R3.

Further, the electrical component storage box 4 forming the work machine room R2 is provided with the electrical component storage inner box 41 forming the inner wall of the work machine room R2 and the electrical component storage outer box installed over the electric component storage inner box 41. A space 4a communicating with the air supply chamber R1 is formed between the electric component storage inner box 41 and the electric component storage outer box 42.
As described above, the engine work machine 1 is provided with the electric component storage outer box 42 installed so as to cover the electric component storage inner box 41, so that the entire casing has a double structure. For this reason, while being able to suppress a sound leak, a soundproof effect and a heat insulation effect can be improved. Further, between the electrical component storage inner box 41 and the electrical component storage outer box 42, a space 4a communicating with the air supply chamber R1 is formed, thereby forming a ventilation path of the outside air flowing to the air supply chamber R1. be able to. For this reason, since a long ventilation path can be formed, the soundproof effect can be improved.

The engine storage box 3 forming the engine room R3 has a center frame 31, and has a roof cover 32 disposed on the outside of the center frame 31 to form a double structure.
As described above, the engine storage box 3 has a double structure in which the roof cover 32 is covered on the outside of the center frame 31, so that the soundproof effect and the heat insulating effect can be improved.

  As described above, in the engine work machine 1 according to the present invention, the electric component storage box 4 and the engine storage box 3 adhere the sound absorbing material (not shown) to the inner wall, and the whole is formed in a double structure. , Soundproof effect and heat insulation effect is excellent. Further, in the flow path of the engine work machine 1, two electric fans of a first electric fan F1 and a second electric fan F2 are arranged in series. For this reason, the wind pressure of the outside air flowing in the flow path is increased, so that the cooling effect can be further enhanced.

[Modification]
The present invention is not limited to the above embodiment, and various modifications and changes are possible within the scope of the technical idea, and the present invention extends to the modified and changed inventions. Of course.
For example, although the engine working machine 1 has been described by taking an engine generator as an example, it may be an engine drive welder, an engine drive compressor or the like.

DESCRIPTION OF SYMBOLS 1 engine work machine 3 engine storage box 4 electric component storage box 4a space 10 case body 11 2nd partition plate 24 1st partition plate 24a 1st electric fan installation port 30 left wall 30b 2nd electric fan installation port 31 center frame 32 roof Cover 33 engine 41 electrical component storage inner box 42 electrical component storage outer box F1 first electric fan F1a first communication port (first communication passage)
F2 second electric fan F2a second communication port (second communication passage)
R1 air supply room R2 work machine room R3 engine room WM work machine

Claims (4)

An engine, a work machine operated by the driving force of the engine, and a case body accommodating the engine and the work machine,
The case body is
An engine compartment housing the engine;
A working machine room that accommodates at least a portion of the working machines;
An air supply chamber into which outside air flows,
A first communication passage communicating between the air supply chamber and the working machine chamber and located at a central portion in the width direction;
A second communication passage communicating between the work machine chamber and the engine chamber and located at a central portion in the width direction;
Equipped with
The air supply chamber, the first communication passage, the working machine chamber, the second communication passage, and the flow passage through which the outside air flows in the order of the engine chamber,
A first electric fan is provided in the air supply chamber,
An engine work machine characterized in that a second electric fan is provided in the work machine room. The first communication passage is formed in a first partition plate that divides the air supply chamber and the working machine chamber,
The first electric fan is installed on the first partition plate,
The second communication passage is formed in a second partition plate or left wall that divides the working machine chamber and the engine chamber.
The second electric fan is installed on the second partition plate or the left wall,
The first electric fan and the second electric fan are installed in series with the flow path,
The engine work machine according to claim 1, characterized in that The electrical component storage box forming the working machine room is:
An electric component storage inner box forming an inner wall of the work machine room;
An electrical component storage case provided over the electrical component storage case box,
A space communicating with the air supply chamber is formed between the electrical component storage inner box and the electrical component storage outer box.
The engine working machine according to claim 1 or 2, characterized in that An engine storage box forming the engine compartment has a center frame, and has a double structure with a roof cover placed on the outside of the center frame.
An engine work machine according to claim 3, characterized by:

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