JP2020084850A - Engine driving work machine - Google Patents

Abstract

To provide an engine driving work machine including a soundproof box which can prevent entry of rain water into an engine compartment.SOLUTION: A partition wall 70 partitions an interior of a soundproof box into an engine compartment 56 and an exhaust air chamber 57. A cover 20 including an inclined part 20a which inclines upward in a direction away from the partition wall 70 is provided below the exhaust air chamber 57 and a tank housing space 63 for housing a tank 60 is formed below the cover 20. A water bar 21 protruding upward is provided in at least a part of a lower end edge of the inclined part 20a of the cover 20. The water bar 21 is butted with the partition wall 70 below a wind introduction port 78 of the partition wall 70, and a gap between the water bar 21 and the partition wall 70 is sealed by a seal material 26 in at least one section S. An introduction hole 73 which introduces pipes 65, 67 communicating with the tank 60 to the engine compartment 56 is provided on the partition wall 70 below the section S sealed by the seal material 26.SELECTED DRAWING: Figure 1

Description

The present invention relates to an engine-driven working machine provided with an engine and a working machine body driven by the engine, and more specifically, the above-mentioned engine and a soundproof box formed of a frame and a bonnet covering an upper surface of the frame. The present invention relates to a package-type engine-driven working machine that houses a working machine body.

As shown in FIG. 9, a work machine main body 340 such as a generator or a compressor, an engine 330 that drives the work machine main body 340, and a frame 310 on which constituent devices including other necessary devices are mounted, The engine-driven working machine 300 in which the above-described components are housed and packaged in a soundproof box configured by a bonnet 350 that covers the upper part of the frame 310 on which the components are mounted has its own drive source, so that it can be installed anywhere. It is widely used in construction sites because it can be used without any operation and is portable.

In such an engine-driven working machine 300, the interior is partitioned into two chambers by a partition wall 370 that vertically partitions the inside of the bonnet 350, one of which is formed as an engine room 356 accommodating the engine 330 and the working machine main body 340, and the other is formed. The exhaust air chamber 357 for exhausting the cooling air passing through the engine room 356 to the outside of the machine is adopted.

The partition wall 370 is composed of a shroud panel 371 having an opening 372 in the center and a radiator 375 attached to the shroud panel 371. When the cooling fan 331 provided in the engine 330 rotates, the engine compartment 356 is rotated. The cooling air introduced into the engine room 356 from the outside through an intake port (not shown) provided on the side wall of the side bonnet cools the inside of the engine room 356, and then, the core portion of the radiator 375 and the shroud panel. It is configured so as to pass through the opening 372 of the air outlet 371 to reach the inside of the air exhaust chamber 357 and be discharged to the outside of the machine through the air exhaust port 354 provided in the air exhaust chamber 357.

In such a soundproof box of the engine-driven working machine 300, not only the function as a frame for mounting the components on the frame 310 described above, but also fuel and lubrication leaked from the engine 330, the working machine main body 340, and other mounted equipments. In order to have a function as an oil barrier so that oil can be stored in the soundproof box without leaking out of the machine, the above-mentioned frame 310 has a bottomed box type opening upward. The one in which the oil leakage reservoir 312 which is a space is formed is also proposed.

A large-capacity fuel tank 360 that stores fuel to be supplied to the engine 330 is housed in the soundproof box of the engine-driven working machine 300 described above in order to continuously operate the engine-driven working machine 300 for a long time without lubrication. Has been done.

In order to secure a space for accommodating such a large-capacity fuel tank 360 in the soundproof box, in the engine-driven working machine described in Patent Document 1 described later, as shown in FIG. A leaking oil reservoir 312 is formed from a position below the wind chamber 357 to a position below the engine chamber 356, a cover 320 is provided below the exhaust chamber 357 to cover the leaking oil reservoir 312, and is formed below the cover 320. In addition, a structure is adopted in which the fuel tank 360 is housed in the tank housing space 363 with the bottom portion fitted in the oil leakage reservoir 312.

The cover 320 is provided with an inclined portion 321a that inclines upward as it moves away from the partition wall 370, so that the cooling air introduced into the air exhaust chamber 357 can be guided toward the air exhaust port 354, thereby cooling the air. The height of the tank housing space 363 is ensured and a large-capacity fuel tank 360 can be housed without obstructing the flow of air.

Japanese Patent No. 6018426

In the engine-driven working machine 300 configured as described above, the exhaust chamber 357 communicates with the outside of the machine through the exhaust port 354 provided on the top plate of the bonnet 350. Rainwater enters the air exhaust chamber 357 through.

Therefore, in the configuration in which the oil leakage reservoir 312 is provided in the frame 310 below the air exhaust chamber 357, when the rainwater that has entered the air exhaust chamber 357 further enters the tank housing space 363, this rainwater will leak to the oil leakage reservoir. It will be accumulated in 312.

The rainwater collected in the oil leak reservoir 312 in this way is mixed with the oil leak in the oil leak reservoir 312 and cannot be drained as it is. Therefore, the cost of wastewater treatment increases.

When the rainwater exceeds the capacity of the oil leak sump 312 and overflows, the oil leaks out of the machine along with the rainwater and pollutes the surrounding environment, and the significance of providing the oil leak sump 312 is lost. ..

Therefore, as described above, in the engine-driven working machine 300 having the structure in which the oil leakage reservoir 312 is provided in the frame 310 below the air exhaust chamber 357, the rainwater that has entered the air exhaust chamber 357 collects in the oil leakage reservoir 312. In order to prevent this, it is necessary to adopt a configuration in which the cover 320 described above blocks the communication between the exhaust chamber 357 and the tank housing space 363 so that rainwater does not enter the tank housing space 363.

In particular, since the tank housing space 363 communicates with the engine room 356 via the oil leakage reservoir 312 formed in the frame 310, the air inside the engine room 356 is used as cooling air by the cooling fan 331 as an exhaust chamber. When it is introduced into the engine room 356 and the inside of the engine room 356 becomes negative pressure, the inside of the tank housing space 363 communicating with the engine room 356 also becomes negative pressure, while the exhaust air room 357 receiving the cooling air from the engine room 356 is added. Since the positive pressure is applied, rainwater in the exhaust chamber 357 easily enters the tank accommodation space 363 due to the pressure difference between the exhaust chamber 357 and the tank accommodation space 363.

Therefore, in the engine-driven working machine 300 described in Patent Document 1, the cover 320 includes the upper plate 321 having the inclined portion 321a and the horizontal portion 321b, and the side plate protruding downward from the peripheral portion of the upper plate 321. A cover 322, 323, 324 is formed into a cap shape that opens downward, and a frame plate 313 is erected so as to surround the opening edge of the oil leak sump 312, and the frame plate 313 opens downward. A structure is adopted in which the cover 320 is attached on the frame 310 in a state of being inserted into the lower end edge of 320 (see the enlarged view in FIG. 9 and FIG. 10 ).

With the structure described in Patent Document 1 described above, it is possible to prevent rainwater from entering the tank housing space 363 almost completely. However, in order to manufacture the cover 320 described above, the cover 320 has a top plate 321. Besides, it is necessary to provide the side plates 322, 323, 324, and the adjacent side plates 322, 323, 324 also need to be watertightly joined by welding, filling with caulking material, or the like.

Further, since the number of manufacturing steps of the soundproof box is increased due to the necessity of attaching the frame plate 313 to the frame 310, the manufacturing cost of the engine-driven working machine 300 is increased.

Here, the attachment of the cover 320 or the frame plate 313 having the above-described structure is a structure necessary for providing the oil leakage reservoir 312 in the frame 310 below the exhaust chamber 357, and the leakage to the above-mentioned position. In an engine-driven working machine that does not have the oil sump 312, it is not necessary to prevent rainwater from entering the tank housing space 363 even if the tank housing space 363 is provided below the exhaust chamber 357.

However, the fuel tank 360 housed in the tank housing space 363 supplies fuel to the engine and collects fuel returning from the engine, a fuel pipe, a fuel pump, and a remaining amount of fuel. Electrical wiring connected to a sensor or the like is attached, and it is necessary to connect the tank housing space 363 and the engine room 356 in order to introduce these pipes and wiring into the engine room 356.

In the engine room 356, electrical components such as the engine 330 and the working machine main body 340 are housed, and electric equipment such as a generator may be housed as the working machine main body 340. It also houses equipment that can cause malfunctions, failures, and electric leakage.

Therefore, even when the oil leakage reservoir 312 is not provided in the frame 310 below the exhaust air chamber 357, the rainwater that has infiltrated into the tank housing space 363 from the exhaust air chamber 357 is further absorbed in the engine chamber 356. It is necessary to have a configuration that does not penetrate into

The infiltration of rainwater into the engine room 356 through the tank housing space 363 as described above is performed by providing the cap-shaped cover 320 or the frame plate 313 as in the above-mentioned Patent Document 1 so that the exhaust chamber 357 and the tank housing space 363 are provided. It can also be solved by completely blocking communication so that rainwater cannot enter the tank housing space 363.

However, in the configuration in which the oil leakage reservoir 312 is not provided in the tank housing space 363, there is no problem in rainwater entering the tank housing space 363 itself, and the cover 320 and the frame plate 313 described in Patent Document 1 are provided. The configuration that completely prevents the infiltration of rainwater into the tank housing space 363 is an excessive equipment for an engine-driven work machine that does not have an oil leak reservoir.

Therefore, the present invention provides a soundproof box having a structure in which a lower part of an exhaust chamber is partitioned by a cover to guide cooling air introduced into the exhaust chamber to an exhaust port and a tank housing space is formed below the exhaust chamber. The equipped engine-driven working machine has a relatively simple structure, and therefore a structure that can be manufactured at low cost, but that can prevent rainwater that has entered the tank housing space from the exhaust chamber from further entering the engine room. It is an object of the present invention to provide an engine-driven work machine having a soundproof box provided with.

The means for solving the problems will be described below together with the reference numerals used in the modes for carrying out the invention. This code is for clarifying the correspondence between the description of the claims and the description of the modes for carrying out the invention, and, needless to say, is limitedly used for the interpretation of the technical scope of the present invention. Not a thing.

In order to achieve the above object, the engine-driven working machine 1 of the present invention comprises:
A space inside the soundproof box formed by the frame 10 and the bonnet 50 covering the frame 10 is provided with an engine compartment 56 for accommodating the engine 30 and the working machine body 40 by a vertical partition wall 70, and the inside of the engine compartment 56. Is separated into an exhaust air chamber 57 that introduces cooling air after cooling the air to the outside of the machine, and the cooling air is exhausted from the engine chamber 56 to the exhaust air chamber 57 through an air guide port 78 provided in the partition wall 70. And the cooling air can be discharged to the outside of the machine through an exhaust port 54 provided on the top plate of the bonnet 50 that defines the exhaust chamber 57. A cover 20 having an inclined portion 20a that inclines upward in a direction away from the partition wall 70 is provided below, and a tank containing a liquid tank 60 such as a fuel tank or a urea water tank is provided below the cover 20. In the engine-driven work machine that forms the space 63,
The partition wall 70 is an air-cooling type heat exchanger 75 installed on the shroud panel 71 with a shroud panel 71 erected on the frame 10 and a core 77 facing an opening 72 provided in the shroud panel 71. And the air duct 78 for communicating the engine chamber 56 with the exhaust chamber 57 by the opening 72 of the shroud panel 71 and the core 77 of the heat exchanger 75. The frame 10 in the lower position of the chamber 57 is configured to be able to be drained to the outside of the machine without collecting rainwater that has dropped on the frame 10.
At least a part of the lower end edge of the inclined portion 20a of the cover 20 is provided with a water blocking plate 21 projecting upward, and the water blocking plate 21 is provided at a position where the air guide port 78 (opening 72 or core 77) is formed. Abutting against the partition wall 70 below, and the gap between the water blocking plate 21 and the partition wall 70 is sealed with a sealing material 26 in at least a part of the section S in the width direction of the partition wall 70.
An introduction hole 73 penetrating the shroud panel 71 is formed below the section S sealed by the sealing material 26 and at a position lower than the heat exchanger 75, and the introduction hole 73 is formed in the liquid tank 60 and the liquid tank 60. The communicating pipe 65 and/or the wiring 67 are arranged in the tank accommodating space 63 at a position overlapping the cover 20 in a plan view, and the pipe 65 and/or the wiring 67 are provided through the introduction hole 73. It is introduced into the engine compartment 56 (Claim 1).

The heat exchanger 75 is a longitudinal flow type heat exchanger, the heat exchanger 75 is attached to the shroud panel 71 on the side of the exhaust chamber 57, and the water stop plate 21 of the cover 20 is The lower tank 76 of the exchanger 75 may be abutted against the lower tank 76 (claim 2, FIG. 1 and FIG. 4).

Further, the heat exchanger 75 may be attached to the shroud panel 71 on the engine room 56 side, and the water blocking plate 21 of the cover 20 may be abutted against the shroud panel 71 (claim 3, (See FIG. 7).

The cover 20 is formed so that the lower end edge of the inclined portion 20a of the cover 20 has substantially the same length as the width of the partition wall 70, and the stopper is formed over substantially the entire length of the lower end edge of the inclined portion 20a. The water plate 21 may be provided and the sealing material 26 may be attached over the entire length of the water stop plate 21 (claim 4 ).

Further, the cover 20 can be fixed to the inner wall of the bonnet 50 forming the air exhaust chamber, for example, via a bracket 51 (see FIG. 4) attached to the inner wall of the bonnet 50 (claim 5).

With the configuration of the present invention described above, the following effects can be obtained in the engine-driven working machine 1 of the present invention.

Like the engine-driven working machine 1 of the present invention, in the structure in which the frame 10 below the exhaust chamber 57 can be discharged outside the machine without collecting rainwater that has dropped on the frame 10, the exhaust port 54 is used. Even if rainwater that has entered the exhaust chamber 57 enters the tank accommodation space 63, the infiltration rainwater is discharged from the tank accommodation space 63 to the outside of the machine. It is a relatively simple structure that does not require a protective structure, and thus can be manufactured at low cost.

On the other hand, in order to introduce the pipe 65 and/or the wiring 67 connected to the liquid tank 60 into the engine chamber 56, the shroud panel 71 provided on the partition wall 70 that partitions the exhaust chamber 57 and the engine chamber 56. The introduction hole 73 is provided, and it is necessary to prevent rainwater that has entered the tank housing space 63 through the introduction hole 73 from further entering the engine compartment 56.

Such infiltration of rainwater occurs when the rainwater adhering to the pipe 65 and/or the wiring 67 described above enters the engine chamber 56 along the pipe 65 and/or the wiring 67. In the configuration of the working machine 1, it is preferable that the rainwater does not adhere to the pipe 65 and the wiring 67 described above, and the rainwater penetrates the pipe 65 and the wiring 67 into the engine room 56 through the introduction hole 73. Could be prevented.

Further, in the configuration of the present invention, it is not necessary to prevent rainwater from entering the tank housing space 63, and it is not necessary to make the lower end of the inclined portion 20 a of the cover 20 watertightly butt across the entire width of the partition wall 70.

As a result, in the case where the heat exchanger 75 having a width narrower than the width of the shroud panel 71 is provided on the side of the exhaust chamber 57 of the shroud panel 71, the lower tank 76 of the heat exchanger 75 has a water blocking plate 21. Even if it is configured to butt together, it is possible to achieve the purpose of preventing rainwater from entering the engine room 56 through the introduction hole 73, and to increase the degree of freedom in designing the arrangement of the heat exchanger 75 and the like. There is.

However, also in the configuration of the engine-driven working machine 1 of the present invention, the heat exchanger 75 is attached to the shroud panel 71 on the engine chamber 56 side, and the water stop provided on the lower end edge of the inclined portion 20a of the cover 20 with respect to the shroud panel 71. It is also possible to adopt a configuration in which the abutting surfaces 21a of the plates 21 are abutted.

Further, the cover 20 is formed so that the lower end edge of the inclined portion 20a of the cover 20 has substantially the same length as the width of the partition wall 70, and the stopper is provided over substantially the entire length of the lower end edge of the inclined portion 20a. In the configuration in which the water plate 21 is provided and the sealing material 26 is attached over the entire length of the water blocking plate 21, the rainwater that has dropped onto the cover 20 is introduced into the engine compartment 56 through the pipe 65 and the wiring 67. The structure can be dropped after being guided to a position away from the hole 73, and as a result, a structure in which rainwater does not easily enter the engine compartment 56 can be obtained.

The front perspective view of the engine drive working machine of this invention. FIG. 3 is a perspective view of the frame with a shroud panel attached. FIG. 3 is a perspective view of the frame with a shroud panel, a heat exchanger, a liquid tank, and a cover attached. FIG. 3 is a perspective view of the frame with a part of the bonnet, a liquid tank, and a cover attached. Explanatory drawing of a state in which the lower end of the inclined part of the cover and the partition wall are abutted with each other (abutment with the lower tank of the radiator). Layout explanatory drawing of a cover, a liquid tank, piping, and wiring in planar view (corresponding to the configuration of FIG. 5). Explanatory drawing of a state in which the lower end of the inclined portion of the cover and the partition wall are abutted with each other (the abutment with the shroud panel). Arrangement explanatory drawing of a cover, a liquid tank, piping, and wiring in plane view (corresponding to the composition of Drawing 7). The front perspective view of the conventional engine drive working machine. Explanatory drawing of the attachment state of the cover with respect to a frame (conventional).

The engine-driven working machine 1 of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the engine-driven working machine 1 of the present invention includes a frame 10 on which an engine 30, a working machine main body 40 (a generator in the illustrated embodiment), and other necessary components are configured. In addition to being mounted, the upper surface of the frame 10 on which these constituent devices are mounted is covered with a box-shaped bonnet 50 having side walls and a top plate to form a package.

At one corner of the top plate of the bonnet 50, an exhaust air outlet 54 formed as a set of many small holes is formed, and the cooling air (exhaust air) used for heat exchange in the bonnet 50 is It is configured so that it can be discharged to the outside of the machine through the air outlet 54.

The space formed inside the bonnet 50 is an air-cooled heat exchanger 75 such as a radiator, oil cooler, intercooler, etc. provided in the engine or working machine body, and this heat exchanger 75 is fixed in a soundproof box. It is partitioned by a partition wall 70 constituted by a shroud panel 71, and one space partitioned by the partition wall 70 houses an engine room 56 for accommodating the engine 30 and the working machine main body 40, and the other is the exhaust port 54. An air exhaust chamber 57 that communicates with is formed.

In the present embodiment, the above-described frame 10 on which the components such as the engine 30 and the working machine body 40 are mounted is, as shown in FIG. 2, the girder plates 12 and 12 provided in the longitudinal direction of the frame 10. , Having a floor plate 11 installed between the upper ends of the girder plates 12, 12 and having a structure in which the girder plates 12, 12 and the floor plate 11 are integrally formed, the constituent devices can be placed on the floor plate 11. It is configured.

In the embodiment shown in FIG. 2, the shroud panel 71 constituting the partition wall 70 is erected on the floor plate 11 of the frame 10, and the supporting member 18 for supporting the bottom portion of the engine 30 and the working machine are provided. Each of the mounts 19 on which the bottom of the main body 40 is placed is provided.

Then, as shown in FIG. 3, the heat exchanger 75 is attached to the shroud panel 71 to form the partition wall 70, and as shown in FIG. 1, the engine 30, the work, and the work on the supporting member 18 and the mount 19. By appropriately mounting the machine bodies 40 and covering the frame 10 with the bonnet 50 in this state, it is possible to realize an appropriate arrangement of each member in the bonnet 50.

The shroud panel 71 to which the heat exchanger 75 is attached is, as shown in FIGS. 2 and 3, a main body portion 71a which is erected in a direction orthogonal to the girder plates 12 and 12 provided on the frame 10, and the main body portion 71a. 71a has side plate portions 71b and 71c projecting from the two sides in the width direction toward the exhaust chamber 57 side, and has a U-shape in plan view surrounded by the main body portion 71a and the side plate portions 71b and 71c. By installing the heat exchanger 75 in the space, the partition wall 70 for partitioning the space in the soundproof box is formed.

In addition, in the embodiment shown in FIGS. 1, 3, 5 and 6, the heat exchanger 75 is attached to the side of the exhaust chamber 57 of the shroud panel 71. Further, as shown in FIG. 8, the heat exchanger 75 may be attached to the engine room 56 side of the shroud panel 71.

In this case, the side plate portions 71b and 71c of the shroud panel 71 may be provided so as to project from both sides of the main body portion 71a toward the engine room 56 side.

The main body 71a of the shroud panel 71 has an opening 72 formed at a position facing the core 77 of the heat exchanger 75, and the core 77 of the heat exchanger 75 generates cooling air between the core tubes. A gap that allows passage is provided, and the partition wall 70 passes cooling air generated by rotation of the cooling fan 31 from the core 77 portion of the heat exchanger 75 to the opening 72 of the shroud panel 71. A wind guide port 78 is formed.

Therefore, the air guide 78 allows the engine room 56 and the air exhaust room 57 to communicate with each other in the soundproof box.

In addition, in the engine-driven working machine 300 described in Patent Document 1 with reference to FIG. 9, a configuration is provided in which the oil leakage reservoir 312 is provided in the frame 310 from the lower portion of the exhaust chamber 357 to the lower portion of the engine chamber 356. However, in the engine-driven working machine 1 of the present invention, the upper surface of the frame 10 at this position is covered with the flat floor plate 11 at least without providing the oil leakage reservoir on the frame 10 at the lower part of the exhaust chamber 57, so that the frame 10 It is constructed so that the rainwater that falls on top can be drained without collecting.

In the illustrated embodiment, not only the inside of the frame 10 at the lower portion of the exhaust chamber 57 but also the frame 10 at the lower portion of the engine chamber 56 is not provided with the above-mentioned oil leak reservoir, but on the engine chamber 56 side, You may employ|adopt the structure which provides an oil leak reservoir in the flame|frame 10.

Note that, in the illustrated embodiment, as shown in FIGS. 2 and 3, a frame plate 13 is erected near the periphery of the frame 10 in the portion of the frame 10 that constitutes the engine chamber 56, and the outer periphery of the frame plate 13 is On the side, the lower end of the side wall of the bonnet 50 can be placed on the floor plate 11 of the frame 10.

With this configuration, it is possible to prevent rainwater from entering the engine compartment 56 through the gap between the lower end of the side wall of the bonnet 50 and the floor plate 11 of the frame 10.

On the other hand, since the frame plate 13 is not provided at the peripheral portion of the frame 10 which is located below the air exhaust chamber 57 and constitutes the tank housing space 63, the air exhaust port 54 and the exhaust air are exhausted. The rainwater that has entered the tank housing space 63 through the chamber 57 can be quickly drained to the outside of the machine without collecting in the tank housing space 63.

As shown in FIG. 1, a cover 20 having an inclined portion 20a is provided in the lower portion of the air exhaust chamber 57 formed by partitioning the space inside the bonnet 50 by the partition wall 70 described above.

By providing the cover 20 in this manner, a tank housing space 63 partitioned by the air exhaust chamber 57 is formed below the air exhaust chamber 57.

In this tank housing space 63, a fuel tank for storing fuel to be supplied to the engine 30 and a reducing agent for SCR (Selective Catalytic Reduction) provided as an exhaust gas purification system in an exhaust system of a diesel engine are introduced. A liquid tank 60, such as a urea water tank that stores urea water, can be housed.

As described above, the cover 20 for partitioning the exhaust chamber 57 and the tank accommodating space 63 is inclined upward in a direction away from the partition wall 70 in the present embodiment, as shown in FIGS. 1, 4 and 5. It has a plate-like structure including a portion 20a and a horizontal portion 20b that extends the upper end of the inclined portion 20a in the horizontal direction. In the present embodiment, as shown in FIG. The cover 20 is attached to the bracket 51 attached to the inner wall of the cover 50 by fixing two sides of the cover 20 which are inclined in the longitudinal direction.

The cover 20 has a function as a protective plate that prevents overheating of the liquid in the liquid tank 60 by preventing the cooling air heated by heat exchange with the engine 30 and the working machine body 40 from directly hitting the liquid tank, A function as an air guide plate that guides the cooling air introduced into the air exhaust chamber 57 toward the air exhaust port 54 provided on the top plate of the hood 50, and into the air exhaust chamber 57 through the air exhaust port 54. The rainwater that has entered has a function as a rain shield that prevents the rainwater from falling onto the liquid tank 60, the piping 65 and the wiring 67 that are in communication with the liquid tank 60, and its shape is used so that these functions can be exerted. And the dimensions are designed.

In order to guide the cooling air to the exhaust air outlet 54, the cover 20 is provided with the above-mentioned inclined portion 20a which inclines upward as it is separated from the partition wall 70 side, and the cooling air is directly applied to the liquid tank 60. In order to prevent this and also to prevent rainwater from falling onto the liquid tank 60, the pipe 65, and the wiring 67, in the present embodiment, as shown in FIGS. The liquid tank 60, the pipe 65 and the wiring 67 communicating with the liquid tank 60 are arranged at the overlapping position.

It should be noted that the cover 20 provided in the engine-driven working machine 1 of the present invention, like the cover 320 provided in the conventional engine-driven working machine 300 introduced as Patent Document 1, is referred to as preventing rainwater from entering the tank housing space 63. Therefore, it is not necessary to provide a side plate on the cover 20 to form a cap-like structure, and the peripheral edge portion of the cover 20 other than the lower end edge does not contact the inner wall of the bonnet 50. They may be mounted at intervals, and therefore rainwater may enter the tank accommodation space 63 through this interval.

As shown in FIGS. 5 and 7, a water blocking plate 21 protruding upward is provided on the lower end edge of the tilting part 20a provided on the cover 20. The water blocking plate 21 and the tilting part 20a form the tilting part 20a. A groove 23 for collecting rainwater that has flowed down is formed.

In the illustrated embodiment, a flat portion 24 is provided which extends the lower end edge of the inclined portion 20a slightly in the horizontal direction, and the water blocking plate 21 which projects upward from the tip of the flat portion 24 is provided. However, the water blocking plate 21 may be directly formed on the lower end of the inclined portion 20a without providing the horizontal portion 24 described above.

In the embodiment shown in FIG. 6, the water blocking plate 21 corresponds to the size of the lower tank 76 of the heat exchanger (radiator) 75, which is slightly shorter than the entire length of the lower edge of the inclined portion 20a. The water blocking plate 21 is abutted over substantially the entire length of the lower tank 76, but the range of forming the water blocking plate 21 is provided corresponding to the formation position of the introduction hole 73 described later. In that case, it may be formed in a shorter range than the illustrated embodiment.

The partition wall 70 (the lower tank 76 of the heat exchanger 75 constituting the partition wall 70 in the example shown in FIG. 5 and the shroud panel constituting the partition wall 70 in the example shown in FIG. 7 of the water blocking plate 21 formed in this manner. 71), a seal member 26 made of an elastic material such as rubber is attached to the abutting face 21a facing the abutting face 21a of the water blocking plate 21 and the partition wall 70 ( In the example shown in FIG. 5, the lower tank 76 of the heat exchanger 75 constituting the partition wall 70, and in the example shown in FIG. 7, the gap between the shroud panels 71) constituting the partition wall 70 is sealed.

The sealing material 26 may be any material that seals the above-mentioned gap in at least a part of the partition wall 70 in the width direction, but in the illustrated embodiment, the above-mentioned length direction of the water blocking plate 21 is used. Is sealed over the entire length of the partition wall 70, and in the width direction of the partition wall 70, the section indicated by the symbol "S" in FIGS. 6 and 8 is sealed.

The abutment of the abutment surface 21a to the partition wall 70 is located below the air guide port 78 (the core 77 part of the heat exchanger 75 and the opening 72 part of the shroud panel 71) provided in the partition wall 70, and As shown in FIG. 5, as long as it has a smoothness capable of sealing a gap formed between the abutment surface 21a, the abutment surface 21a may be abutted with the lower tank 76 included in the heat exchanger 75 constituting the partition wall 70. As shown in FIG. 7, the main body 71a of the shroud panel 71 may be butted against the main body 71a below the formation position of the opening 72 provided in the main body 71a.

At these abutting positions, the rainwater flowing down the inclined portion 20a is prevented from entering the engine compartment 56 through the core 77 of the heat exchanger 75 and the opening 72 provided in the shroud panel 71 so that the rainwater of the heat exchanger 75 is prevented. The core 77 and the shroud panel 71 are abutted at a position sufficiently lower than the lower edge of the opening 72 provided in the shroud panel 71.

With such a configuration, it is possible to prevent rainwater that has flowed down the inclined portion 20a of the cover 20 from falling below at least the portion to which the sealing material 26 is attached, and at the same time, to prevent heat loss from the heat exchanger 75. Intrusion into the engine compartment 56 is prevented through the openings 72 provided in the core 77 and the shroud panel 71, and hence the air guide ports 78 provided in the partition wall 70.

As a result, the introduction hole 73 provided in the shroud panel 71 for introducing the pipe 65 and the wiring 67 communicating with the liquid tank 60 into the engine compartment 56 is provided below the section S sealed by the sealing material 26, and By installing the shroud panel 71 at a position lower than the heat exchanger 75, rainwater that has fallen into the tank housing space 63 is prevented from entering the engine room 56 through the introduction hole 73. it can.

1 Engine Drive Working Machine 10 Frame 11 Floor Board 12 Girder Board 13 Frame Board 18 Supporting Material 19 Frame 20 Cover 20a Inclined Part 20b Horizontal Part 21 Water Stop Plate 21a Abutting Surface 23 Groove 24 Flat Part 26 Sealing Material 30 Engine 31 Cooling Fan 40 Work Machine main body 50 Bonnet 51 Bracket 54 Air outlet 56 Engine room 57 Air exhaust chamber 60 Liquid tank 63 Tank storage space 65 Piping 67 Wiring 70 Partition wall 71 Shroud panel 71a Main body 71b, 71c Side plate 72 Open 73 Inlet 75 Heat exchanger 76 Lower Tank 77 Core 78 Air Guide 300 Engine Drive Work Machine 310 Frame 312 Oil Leakage 313 Frame Plate 320 Cover 321 Top Plate 321a Inclined Part 321b Horizontal Part 322, 323, 324 Side Plate 330 Engine 331 Cooling Fan 340 Working Machine Main Body 350 Bonnet 354 Exhaust port 356 Engine room 357 Exhaust chamber 360 Fuel tank 363 Tank storage space 370 Partition wall 371 Shroud panel 372 Opening 375 Radiator

Claims (5)

A frame, an engine room for accommodating an engine and a working machine body in a space in a soundproof box formed by a hood covering the frame by a vertical partition wall, and a cooling air after cooling the engine room And a cooling air is introduced from the engine room to the exhaust chamber through an air guide port provided in the partition wall and defines the exhaust chamber. The cooling air can be discharged to the outside of the machine through an air outlet provided on the top plate of the bonnet, and an inclined portion that is inclined upward in a direction away from the partition wall is provided below the air exhaust chamber. An engine-driven working machine in which a tank housing space for housing a liquid tank is formed below the cover,
The partition wall includes a shroud panel erected on the frame, and an air-cooled heat exchanger attached to the shroud panel with a core facing an opening provided in the shroud panel, and the shroud panel Of the core and the opening of the heat exchanger, the air guide port that connects the engine chamber and the exhaust chamber is provided, and the frame below the exhaust chamber is dropped onto the frame. It is constructed so that it can be drained outside the machine without collecting rainwater.
At least a part of the lower end edge of the inclined portion of the cover is provided with a water blocking plate projecting upward, and the water blocking plate is abutted against the partition wall below the position where the air guide port is formed, and The gap between the water stop plate and the partition wall is sealed with a sealing material in at least a part of the partition wall in the width direction,
An introduction hole that penetrates the shroud panel is formed below the section sealed by the sealing material and at a position lower than the heat exchanger, and the liquid tank and a pipe and/or a pipe communicating with the liquid tank are formed. An engine driving operation characterized in that wiring is arranged in the tank accommodation space at a position overlapping the cover in a plan view, and the piping and/or wiring is introduced into the engine room through the introduction hole. Machine. The heat exchanger is a longitudinal flow type heat exchanger, the heat exchanger is attached to the shroud panel on the side of the exhaust chamber, and the water stop plate of the cover is butted to a lower tank of the heat exchanger. The engine-driven work machine according to claim 1, wherein The engine-driven working machine according to claim 1, wherein the heat exchanger is attached to the shroud panel on the engine room side, and the water stop plate of the cover is butted against the shroud panel. The cover is formed so that the lower end edge of the inclined portion of the cover has substantially the same length as the width of the partition wall, and the water blocking plate is provided over substantially the entire length of the lower end edge of the inclined portion. The engine-driven working machine according to any one of claims 1 to 3, wherein a sealing material is attached over the entire length of the water stop plate. The engine-driven working machine according to claim 1, wherein the cover is fixed to an inner wall of the bonnet forming the exhaust chamber.

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