JP7284567B2 - engine driven work machine - Google Patents

Description

The present invention is a package-type engine-driven work machine in which components are housed in a soundproof box consisting of a frame having an oil leaking reservoir formed therein to function as an oil barrier and a bonnet covering the upper surface of the frame. More specifically, the present invention relates to an engine-driven working machine capable of discharging rainwater that has entered the soundproof box without collecting it in a leaking oil reservoir formed in the frame.

As shown in FIG. 11, a work machine body 340 such as a generator and a compressor, an engine 330 for driving the work machine body 340, and other necessary equipment are mounted on a frame 310 on which components are mounted. The engine-driven working machine 300, which is packaged by housing the components in a soundproof box composed of a bonnet 350 covering the upper part of the frame 310 on which the components are mounted, can be installed anywhere by having its own drive source. It is widely used at construction sites, etc., because it can be used without any need and is portable.

In such an engine-driven work machine 300, the inside of the bonnet 350 is partitioned into two chambers by a partition wall 355, one of which is an engine room 356 housing the engine 330 and the work machine main body 340, and the other. , and an exhaust chamber 357 for discharging the cooling air that has passed through the engine chamber 356 to the outside of the machine.

An opening 355a is provided in the partition wall 355 to communicate the engine chamber 356 and the exhaust chamber 357 in order to cool the equipment housed therein. By providing a radiator fan 331 that blows cooling air to the engine compartment 356, the cooling air introduced into the engine compartment 356 from outside through an air intake (not shown) provided on the side wall of the bonnet on the engine compartment 356 side is After cooling the inside of the engine compartment 356, it passes through the radiator core 332, reaches the exhaust chamber 357, and can be discharged to the outside of the machine through the exhaust port 354 provided in the exhaust chamber 357.

In such a soundproof box of the engine-driven work machine 300, fuel and lubricating oil leaking from the engine 330, the work machine main body 340, and other mounted devices can be stored in the soundproof box without leaking out of the machine. In order to achieve this, a bottomed box-shaped space that opens upward is formed in the frame 310 as a leaking oil reservoir 312, so that the frame 310 functions only as a frame for mounting the components. Instead, it has been proposed to have a function as an oil barrier to store leaked oil such as fuel and lubricating oil leaked from mounted equipment.

A fuel tank 360 storing fuel to be supplied to the engine 330 is accommodated in the soundproof box of the engine-driven work machine 300 described above. , it is necessary to secure a space capable of accommodating the large-capacity fuel tank 360 in the soundproof box.

In order to secure a space for accommodating such a large-capacity fuel tank 360, in the engine-driven work machine described in Patent Document 1, as shown in FIG. A leaking oil reservoir 312 reaching the engine room 356 is formed, a cover 320 is provided below the exhaust chamber 357 to cover the leaking oil reservoir 312, and a fuel tank 360 is placed in a tank accommodating space 363 formed below the cover 320. Suggest containment.

In the engine-driven working machine 300 described in Patent Document 1, in order to form the tank housing space 363 as large as possible, the cover 320 is provided with an upward inclination toward a direction away from the partition wall 355. By providing the inclined portion 321a, the height of the tank housing space 363 is secured, and the cooling air introduced from the engine room 356 into the exhaust chamber 357 is guided toward the exhaust port 354 by the inclined portion 321a. This ensures that the flow of cooling air is not obstructed.

Japanese Patent No. 6018426

As described above, in the engine-driven work machine 300 in which the leaked oil reservoir 312 is formed in the frame 310, the leaked oil is stored in the leaked oil reservoir 312, so that the surrounding environment is not contaminated by the leaked oil. prevent

However, in the engine-driven work machine 300 having such a leaking oil reservoir 312 , when rainwater enters the soundproof box, not only the leaked oil but also the infiltrated rainwater is collected in the leaking oil reservoir 312 .

Since the rainwater collected in the leaked oil reservoir 312 in this way is mixed with the leaked oil in the leaked oil reservoir 312, it cannot be discharged as it is together with domestic wastewater, etc., and an oil separator, etc. The oil is then removed to make clean water, and then the water is discharged, or the waste is disposed of by a waste disposal company.

In addition, when the leaked oil reservoir 312 overflows due to accumulation of rainwater exceeding its capacity, oil in the leaked oil reservoir 312 leaks out of the machine together with the rainwater, polluting the surrounding environment.

Therefore, it is preferable that the rainwater that has entered the soundproof box can be discharged directly outside the machine before being collected in the leaking oil reservoir 312 .

Thus, in order to prevent rainwater from accumulating in the leaking oil reservoir 312, in the engine-driven working machine 300 described in Patent Document 1, the above-described cover 320 that separates the exhaust chamber 357 and the tank housing space 363 is provided. The lower end of the provided inclined portion 321a is watertightly abutted against the partition wall 355 at a position lower than the lower edge of the opening 355a. rainwater that has run down can be drained outside the machine.

However, in the structure described in Patent Document 1 in which the cover 320 is provided with the inclined portion 321a as described above, when a large amount of rainwater enters the exhaust chamber 357 through the exhaust port 354 during heavy rain, the cover is When a large amount of rainwater flows vigorously down the inclined portion 321a of 320 toward the partition wall 355, the rainwater may enter the engine compartment 356 side beyond the groove 362 and the opening 355a of the partition wall 355. Rainwater that has entered the engine room 356 in this manner accumulates in the leaking oil reservoir 312 .

As a result, there is a cost to dispose of the collected rainwater, and if the leaked oil reservoir 312 overflows with rainwater that exceeds its capacity, the leaked oil will leak out of the machine together with the rainwater, polluting the surrounding environment. The above-mentioned problem of being stored occurs.

In the above explanation, the configuration in which the space for accommodating the fuel tank 360 is formed below the exhaust chamber 357 was explained, but an SCR (Selective Catalytic Reduction) system is provided as an exhaust gas purification system in the exhaust system of the diesel engine. In this case, a urea water tank containing urea water to be introduced into the SCR system as a reducing agent is mounted in the soundproof box. Although it is conceivable to use the space for housing a urea water tank in place of the fuel tank 360, even if the type of tank housed in the tank housing space 363 is changed, the above-described problems can occur in the same way.

In the above example, the radiator core 332 is arranged on the side of the engine compartment 356, so that the lower end of the inclined portion 321a of the cover 320 abuts against the partition wall 355. In the configuration arranged on the 357 side or the configuration embedded in the partition wall 355, the lower end of the inclined portion 321a of the cover 320 is abutted against the lower frame or the like provided in the radiator core 332 to form the groove 362 described above. However, even if the member against which the lower end of the inclined portion 321a of the cover 320 abuts is changed to the lower frame of the radiator core 332, the rainwater flowing down the inclined portion 321a may If rainwater enters the engine compartment 356 through the gap between the cooling fins of the radiator core 332 and the opening 355a of the partition wall 355 beyond the groove 362, the above-mentioned problem of rainwater accumulating in the leaking oil reservoir 312 occurs. The problem of (3) can also occur in configurations other than the configuration in which the lower end of the inclined portion 321a abuts against the partition wall 355. As shown in FIG.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and the exhaust chamber is partitioned into upper and lower parts by a cover having an inclined portion as described above, and a fuel tank, a urea water tank, etc. are placed below the exhaust chamber. In an engine-driven work machine having a tank housing space for housing a tank, even if a large amount of rainwater enters the exhaust chamber through the exhaust port, the rainwater does not enter the engine chamber side. To provide an engine-driven working machine having a structure capable of draining oil to the outside of the machine without collecting it in a leaking oil reservoir.

Means for solving the problems are described below together with the symbols used in the mode for carrying out the invention. This code is for clarifying the correspondence between the description of the claims and the description of the mode for carrying out the invention, and needless to say, it is used restrictively to interpret 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 has:
A space in a soundproof box formed by the frame 10 and a bonnet 50 covering the frame 10 is divided by a vertical partition wall 55 to accommodate an engine 30 and a working machine main body 40. The engine compartment 56 and the exhaust air chamber 57 are communicated through an opening 55a provided in the partition wall 55, and , the exhaust chamber 57 is opened to the outside of the machine through an exhaust port 54 formed in the top plate of the bonnet 50,
In the space within the frame 10 from the lower position of the exhaust chamber 57 to the lower position of the engine room 56, a bottomed leaking oil reservoir 12 is formed that opens upward, and the open portion of the leaking oil reservoir 12 is formed. A frame plate 13 surrounding the frame 10 is erected on the frame 10,
The open portion of the leaked oil reservoir 12 below the exhaust chamber 57 is covered with a cover 20, and the cover 20 forms a tank housing space 63 below the exhaust chamber 57, which is isolated from the upper space. In engine-driven work equipment,
on the cover 20,
a top plate 21 having an inclined portion 21a inclined upward in a direction away from the partition wall 55 and partitioning the tank accommodating space 63 below the exhaust chamber 57 from the exhaust chamber 57 above;
Side plates 22 and 23 projecting downward from side edges 211 and 212 of the top plate 21 parallel to the tilt direction id of the tilt portion 21a in a plan view and having lower ends disposed outside the frame plate 13 are provided,
Rainwater falling from the lower end of the inclined portion 21a is prevented by watertightly abutting the lower end of the inclined portion 21a against the partition wall 55 or a device attached to the partition wall 55 (for example, the lower frame of the heat exchanger 32). The side plate 22 protrudes downward from at least one of the side edges 211 and 212 by restricting the flow of rainwater toward the partition wall 55 on the upper surface of the inclined portion 21a at an intermediate position in the inclination direction. , 23 is provided with a guide body 26 (Claim 1).

The guide body 26 is attached to the inclined portion 21a in a direction that intersects the inclined direction id of the inclined portion 21a. (Claim 2, see FIG. 7).

The upper surface plate 21 of the cover 20 is made of a metal plate, and the guide body 26 is formed by a groove or a ridge formed in a direction intersecting the inclination direction id of the inclined portion 21a by plastic working such as step bending. It may be formed (see claim 3 and FIG. 8).

The guide body 26 may be provided with a wind guide surface 27 that guides the flow of cooling air introduced into the exhaust chamber 57 through the opening 55 a of the partition wall 55 toward the exhaust port 54 . It is preferable (see claim 4 and FIG. 10).

The guide body 26 is bent at the center 26c in the longitudinal direction so that both ends 26a and 26b of the guide body 26 are positioned lower than the center 26c in the longitudinal direction of the guide body 26. 21a (see claim 5 and FIG. 9(B)).

When the top plate 21 of the cover 20 is provided with a horizontal portion 21b extending horizontally from the upper end of the inclined portion 21a, the end portion of the horizontal portion 21b on the side of the inclined portion 21a is extended toward the inclined portion 21a. It is preferable to provide a water stop plate 28 for regulating the inflow of rainwater (see claim 6, FIGS. 6 to 8, and 10).

The frame 10 at the position where the frame plate 13 is formed is further provided with a flange 14 protruding toward the outer periphery. The bottom edge of the side wall of the bonnet 50 is joined to or adjacent to the flange 14 outside the side plates 22, 23, and the bottom edge of the side wall of the flange 14 and/or the side wall of the bonnet 50 is, for example, passed through the flange 14. a through hole 151 formed in the lower end of the side wall, a through hole 152 formed in the lower end of the side wall, and/or a gap 153 formed between the lower end of the side wall of the flange 14 and the bonnet 50. Claim 7, see FIG. 5).

With the configuration of the present invention described above, the engine-driven working machine 1 of the present invention has the following effects.

By arranging the lower ends of the side plates 22 and 23 provided on the cover 20 outside the frame plate 13, the rainwater running down along the outer surfaces of the side plates 22 and 23 is prevented from leaking oil provided inside the frame plate 13. A side edge 211 connected to the side plates 22 and 23 is configured to prevent rainwater from entering the reservoir 12, and the inclined portion 21a provided on the upper surface plate 21 of the cover 20 regulates the flow of rainwater toward the partition wall 55 side. , 212, the flow of rainwater is guided to the outside of the frame plate 13 through the side plates 22 and 23 and discharged to the outside of the machine. The amount of rainwater flowing down and flowing toward the partition wall 55 can be greatly reduced, and the momentum of the flow can be greatly weakened, so that the rainwater can flow through the opening 55a provided in the partition wall 55. Intrusion into the engine room 56 side could be prevented.

The aforementioned guide body 26 can be easily formed by attaching various shaped materials to the inclined portion 21a provided on the upper surface plate 21 of the cover 20, or the inclined portion 21a of the cover 20 can be formed by: It could be easily formed by forming grooves or ridges by bending or other plastic working.

In addition, in the configuration in which the guide body 26 is provided with the air guide surface 27 for guiding the flow of the cooling air toward the air exhaust port 54, the cooling air flows well in the air exhaust chamber 57 and passes through the soundproof box. As a result, the cooling efficiency can be improved by increasing the cooling air flow rate, and noise can be reduced by reducing wind noise.

The guide body 26 is bent at the center 26c in the longitudinal direction so that both ends 26a and 26b of the guide body 26 are positioned lower than the center 26c in the longitudinal direction of the guide body 26 [Fig. B)], the rainwater flowing on the inclined portion 21a can be distributed to the left and right, and the rainwater guided to the guide body 26 by the inclination of the guide body 26 can flow smoothly. I was able to drain.

The upper surface plate 21 of the cover 20 is provided with a horizontal portion 21b that extends the upper end of the inclined portion 21a in the horizontal direction. In the structure provided with the water stop plate 28 that regulates the inflow of the water, the rainwater received on the horizontal portion 21b becomes difficult to flow into the inclined portion 21a side, thereby further weakening the momentum of the rainwater flowing through the inclined portion 21a. As a result, it is difficult for rainwater to flow into the engine compartment 56 through the opening 55a provided in the partition wall 55.

The frame 10 at the position where the frame plate 13 is formed is further provided with a flange 14 protruding toward the outer periphery. The lower end of the side wall of the side plate 22, 23 is joined or placed close to the flange 14 outside the side plates 22, 23, and the drain hole 15 is provided at the lower end of the side wall of the flange 14 and/or the bonnet 50. The rainwater could be drained smoothly to the outside of the machine through the drain hole 15. - 特許庁

1 is a perspective view of an engine-driven work machine of the present invention; FIG. 1 is a perspective front view of an engine-driven working machine of the present invention; FIG. A perspective view of the frame. FIG. 2 is an enlarged perspective view of a fuel tank and a cover portion; Fig. 2 is an illustration of the frame plate, flange, and bonnet attached to the frame; (A) is a configuration in which the lower end of the side wall of the bonnet abuts against the flange, and (B) and (C) are a drain hole at the lower end of the side wall of the bonnet. set configuration. A perspective view of a cover. (A) is a cross-sectional view of the exhaust chamber part of the engine-driven work equipment, and (B) to (G) are enlarged cross-sectional views of the parts marked with a circle in (A). 4 shows a modified example of the guide body (section member). Sectional drawing of the exhaust chamber part of the engine-driven working machine which shows the modification of a guide body. It is an explanatory view of the formation state of the guide body for the inclined part, (A) is an example in which the guide body is provided in the direction orthogonal to the inclined direction, (B) is an example in which the guide body is provided in a state where the center of the longitudinal direction is bent. indicates FIG. 4 is an explanatory diagram of a guide body provided with a wind guide surface; FIG. 2 is a perspective front view of a conventional engine-driven work machine;

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

The basic structure of the engine-driven work machine 1 of the present invention is common to the conventional engine-driven work machine 300 described with reference to FIG. A generator) 40, a battery 70, and other necessary equipment are placed, and the top surface of the frame 10 on which these components are placed is a box-shaped box with side walls and a top plate. It is covered with a bonnet 50 and packaged.

In FIG. 1, part of the bonnet 50 is seen through in order to explain the structure inside the exhaust chamber 57, which will be described later. Also, in FIG. 1, inspection windows 52 and 53 are provided on the side of the bonnet 50, and the state in which these windows 52 and 53 are opened is shown. can be closed by a door (not shown) to which a ) can be opened to facilitate maintenance such as internal inspection.

In the illustrated embodiment, a wire net-like air outlet 54 is provided at one corner of the top plate of the hood 50 , and the cooling air (exhaust air) used for heat exchange in the hood 50 passes through this air outlet 54 . It is configured so that it can be discharged to the outside of the machine through the

As shown in FIG. 2, the space inside the bonnet 50 is partitioned by a partition wall 55. One of the partitioned spaces by the partition wall 55 contains an engine room 56 for housing the engine 30 and the work machine main body 40. On the other hand, an exhaust chamber 57 communicating with the aforementioned exhaust port 54 is formed.

The two chambers 56 and 57 communicate with each other through an opening 55a formed in the center of the partition wall 55. In the example shown in FIG. A heat exchanger (including a radiator, an oil cooler, an intercooler, etc.) 32 provided in the engine 30 and the work machine main body 40 is attached. Cooling air is introduced into the exhaust chamber 57 and discharged to the outside of the machine through an exhaust port 54 opened at the upper portion of the exhaust chamber 57 .

Although FIG. 2 shows an example in which the heat exchanger 32 is arranged on the engine room 56 side, the heat exchanger 32 may be arranged on the exhaust air chamber 57 side. It may be installed in a state embedded in the wall 55, and when a plurality of heat exchangers such as a radiator, an oil cooler, and an intercooler are installed at the same time, they are arranged separately on the engine room 56 side and the exhaust air room 57 side. It is good as

As shown in FIGS. 2 and 3, the frame 10 on which the components such as the engine 30 and the work machine body 40 are mounted is a channel material having a substantially U-shaped cross section in the width direction, as shown in FIGS. are arranged in a rectangular shape so as to form an outward-opening U-shape and are fixed by welding or other methods to form a frame-like basic structure.

In the embodiment shown in FIG. 3, a partition wall 55 and a base 17 on which the heat exchanger 32 is placed, a support member 18 for supporting the bottom of the engine 30, and a work machine main body 40 are mounted on the frame 10. Mounting frames 19 for mounting the bottom portion are provided respectively, and partition walls 55, heat exchangers 32, engines 30, and working machine main bodies 40 are mounted on these bases 17, supporting members 18, and mounting frames 19, as shown in FIG. By covering the frame 10 with the bonnet 50 in a state where they are placed, each member can be properly arranged in the hood 50 .
As shown in FIGS. 2 and 3, a leakage oil reservoir 12 is formed in the frame body of the frame 10 extending from the lower portion of the exhaust chamber 57 to the lower portion of the engine chamber 56 .

This leaking oil reservoir 12 may be formed, for example, by mounting a watertight bottomed box with an open top inside the frame of the frame 10, or the vertical walls of the channel material forming the frame of the frame 10. It may be formed by attaching a metal plate or the like that will be the bottom surface of the leaking oil reservoir 12 to the inner peripheral surface of the in a watertight manner by a method such as welding. It is not particularly limited.

In the embodiment shown in FIG. 2, the leaking oil reservoir 12 is provided from the lower part of the exhaust chamber 57 to about 1/3 of the longitudinal direction of the engine room 56. The formation range of the oil sump 12 is not limited to the illustrated example, and may be expanded or reduced as long as a sufficient capacity can be secured for the capacity of the fuel tank 60 .

In the frame 10 configured as described above, at least the portion where the leaked oil reservoir 12 is formed, preferably the frame 10 in a wider range than the formed portion of the leaked oil reservoir 12, is provided with the oil shown in FIGS. As shown, the frame plate 13 for preventing rainwater from entering the leaking oil reservoir 12 is erected continuously in the circumferential direction.

In the example shown in FIG. 5, a frame plate 13 is provided by attaching a band plate to the inner peripheral edge of the frame 10 by a method such as welding. The watertightness shall be ensured by continuous welding along the entire perimeter or affixing or applying sealing material as necessary.

In addition, as described above, when forming the leaking oil reservoir 12 by attaching a box with a bottom that opens upward in the frame of the frame 10, the upper opening edge of this box is aligned with the upper opening of the frame 10. By attaching the frame plate 13 so as to protrude upward from the edge, the work of attaching the frame plate 13 separately becomes unnecessary.

By providing the frame plate 13 on the frame 10 in this manner, the frame plate 13 serves as a barrier against rainwater that tries to enter the leaking oil reservoir 12 from the outside of the frame plate 13. On the other hand, if the side wall of the bonnet 50 is arranged on the outside, even if rainwater drops down along the inner wall of the bonnet 50, it can be prevented from entering the leaking oil reservoir 12.例文帳に追加

As described above, by forming the frame body of the frame 10 with a U-shaped channel material, in this embodiment, the flange 14 projecting in the outer peripheral direction is formed at the upper opening edge of the frame 10. 4, through-holes 151 are provided as drain holes 15 through the thickness of the flange 14 at predetermined intervals, and rainwater falling on the flange 14 can be drained out of the machine through the drain holes 15. be able to.

In addition, since the drain hole 15 is arranged in the exhaust chamber 57, which has a slightly higher pressure than the outside of the machine when the engine-driven work machine 1 is in operation, the pressure difference between the inside of the exhaust chamber 57 and the outside of the machine Rainwater can be smoothly discharged to the outside of the machine.

Then, for example, as shown in FIG. 5A, by joining the lower end of the side wall of the bonnet 50 to the peripheral edge of the flange 14, the above-mentioned frame plate 13, the flange 14, and the side wall of the bonnet 50 form the drainage channel 16. As a result, the rainwater that has fallen down along the inner wall of the bonnet 50 is surely collected in the drainage channel 16 and discharged outside the machine through the drain hole 15 provided in the flange 14, so that it can pass over the frame plate 13. Therefore, the leaked oil does not enter into the oil reservoir 12.

In the above description, the case where the through hole 151 provided in the flange 14 is used as the drain hole 15 was described as an example, but instead of this configuration, or together with this configuration, for example, as shown in FIG. A through hole 152 provided at the lower end of the side wall of the bonnet 50 may be used as the drain hole 15 as shown in FIG. The gap 153 may be used as the drain hole 15 described above.

As shown in FIG. 2, a cover 20 is provided below the exhaust chamber 57 formed by partitioning the space inside the bonnet 50 with the partition wall 55 described above. It defines a bottom portion and is configured so that rainwater that has entered the exhaust chamber 57 does not drop into the leaking oil reservoir 12 .

By defining the bottom portion of the exhaust chamber 57 with the cover 20 as described above, the space formed below the upper surface plate 21 of the cover 20 is defined as the tank housing space 63. In this tank housing space 63, A fuel tank 60 and a liquid tank such as a urea water tank (the fuel tank 60 in the illustrated example) can be accommodated in a state where the bottom thereof is received in the leaking oil reservoir 12 .

As shown in FIGS. 2, 4 and 6, the cover 20 has an inclined portion 21a inclined upward in a direction away from the partition wall 55 and a horizontal portion 21b extending horizontally from the upper end of the inclined portion 21a. and side plates 22, 23, and 24 protruding downward from three sides of the top plate 21 excluding one side forming the lower end of the inclined portion 21a. The lower end of the inclined portion 21a provided on the top plate 21 abuts against the partition wall 55 in a watertight manner, and the lower ends of the side plates 22, 23, 24 are arranged outside the frame plate 13 described above. By installing the cover 20 so as to be placed on the flange 14 at the end, rainwater falling on the cover 20 is prevented from entering the leakage oil reservoir 12 .

As shown in FIG. 6, the sloped portion 21a provided on the cover 20 is provided with a rainwater flow parallel to the slope direction id of the sloped portion 21a in plan view to regulate the flow of rainwater flowing downward on the sloped portion 21a. A guide body 26 is provided to guide the side edges 211 and 212 so as to form a direction.

The guide body 26 has, for example, an L-shaped cross section [including L-shaped shapes other than right angles as shown in FIG. 7(C) in addition to FIG. 7(B)], Z-shaped [see FIG. 7(E)], channel type [see FIG. 7(F)], flat type [see FIG. 7(G)], etc. Alternatively, as shown in FIG. 8, the cover 20 is formed of a metal plate, and grooves or ridges (V-shaped grooves in the example shown) are formed in the inclined portion 21a of the cover 20 by plastic working (step bending in the example shown). ) may be provided as the guide body 26 described above.

As shown in FIG. 9(A), the guide member 26 may be formed as a linear member having a length direction perpendicular to the inclination direction id of the inclined portion 21a. As shown in Fig. 2, the guide body 26 is bent at the center 26c in the longitudinal direction so that the center 26c in the longitudinal direction is located at a high position with respect to both ends 26a and 26b in the longitudinal direction of the guide body 26. By forming such a curved shape, rainwater may smoothly flow along the guide body 26 toward the sides 211 and 212 .

As shown in FIG. 10, the surface of the guide body 26 facing the heat exchanger 32 has a shape in which the upper end thereof extends toward the exhaust port 54 so that the cooling air introduced into the exhaust chamber 57 is As indicated by the arrow in FIG.

In the illustrated embodiment in which the upper surface plate 21 of the cover 20 has a horizontal portion 21b extending horizontally from the upper end of the inclined portion 21a, a water stop plate 28 is attached to the edge of the horizontal portion 21b on the inclined portion 21a side. It may be configured such that the rainwater received on the horizontal portion 21b is restricted from flowing into the inclined portion 21a and dropped toward the side plates 22-24.

2, the lower end of the inclined portion 21a of the cover 20 configured as described above does not have an opening 55a provided in the partition wall 55 in the configuration in which the heat exchanger 32 is attached to the partition wall 55 on the engine room 56 side as shown in FIG. A groove 62 extending to the outside of the frame plate 13 is formed at a position where the partition wall 55 abuts against the lower end of the inclined portion 21a in a watertight manner at a position below the lower end edge. .

In addition, in the configuration in which the heat exchanger 32 is attached to the partition wall 55 on the exhaust chamber 57 side, or in the configuration embedded in the partition wall 55, the lower end of the inclined portion 21a is attached to the lower frame of the heat exchanger 32 or the like. A watertight abutment may also be used to prevent rainwater from falling downward from the lower end portion of the inclined portion 21a. If possible, the abutment position of the lower end of the inclined portion 21a is not limited to the above position.

Thus, the groove 62 formed at the abutting position between the lower end of the inclined portion 20a and the partition wall 55 is extended to the outside of the frame plate 13, and the groove 62 is formed between the frame plate 13, the flange 14, and the frame plate 13. It communicates with the drainage channel 16 formed by the inner wall of the bonnet 50 .

[Action, etc.]
When the engine-driven work machine 1 configured as described above is installed outdoors in rainy weather and used, rainwater that has entered the exhaust chamber 57 through the exhaust port 54 provided on the top plate of the bonnet 50 will flow into the exhaust chamber 57 . falls onto the top plate 21 of the cover 20 which defines the lower end of the .

The rainwater that has fallen on the upper surface plate 21 follows the flow paths indicated by the arrows in FIG.

Rainwater falling on the upper surface plate 21 of the cover 20 and rainwater falling on the horizontal portion 21b is restricted from moving toward the inclined portion 21a by the existence of the water stop plate 28, and is prevented from moving toward the inclined portion 21a from other portions of the horizontal portion 21b. It falls along the surfaces of the side plates 22 , 23 , 24 and is introduced into the aforementioned drainage channel 16 formed by the frame plate 13 , the flange 14 and the inner wall of the bonnet 50 .

Further, the rainwater that has fallen onto the inclined portion 21a is prevented from moving in the inclined direction by the guide bodies 26 provided at each dropping position, and is guided by the guide bodies 26 toward the side plates 22 and 23 as described above. It is introduced into the drainage channel 16 .

As a result, of the rainwater that has fallen onto the inclined portion 21a, only a small amount of rainwater reaches the groove 62 formed at the lower end of the inclined portion 21a. By being introduced into the groove 62 in a state where the momentum is greatly weakened, the rainwater that has fallen along the inclined portion 21a crosses the groove 62 and further passes through the opening 55a of the partition wall 55 to the engine room. Entry into 56 is prevented.

In this way, the rainwater introduced into the drainage channel 16 is smoothly discharged to the outside of the machine through the drain hole 15, so that the rainwater that has entered the soundproof box through the exhaust port 54 is removed from the leaked oil. It can be discharged directly to the outside of the machine without accumulating in the reservoir 12 .

As shown in FIG. 10, in the configuration in which the guide body 26 is provided with the air guide surface 27 that guides the flow of the cooling air toward the exhaust port 54, the engine compartment through the opening 55a provided in the partition wall 55. The cooling air introduced from 56 into the exhaust chamber 57 is not only deflected upward by colliding with the inclined portion 21a, but also deflected by the air guide surface 27 toward the exhaust port 54. The cooling air can smoothly pass through the exhaust chamber 57, and the volume of the cooling air passing through the soundproof box is increased. In addition to improving the cooling efficiency of the component equipment, noise was also reduced by reducing wind noise caused by exhaust air.

1 engine-driven work machine 10 frame 12 leaking oil reservoir 13 frame plate 14 flange 15 drain hole 151, 152 through hole 153 gap 16 drainage channel 17 base 18 support member 19 mount 20 cover 21 upper plate 211, 212 side (upper plate of)
21a inclined portion 21b horizontal portion 22, 23, 24 side plate 26 guide body 26a, 26b end (guide body)
26c center (of guide body)
27 air guide surface 28 water stop plate 30 engine 31 cooling fan 32 heat exchanger 40 work machine main body 50 bonnet 52, 53 window 54 air outlet 55 partition wall 55a opening 56 engine compartment 57 exhaust chamber 60 fuel tank 62 groove 63 tank housing Space 70 battery 300 engine 300 engine driving worker 310 frame 312 frame 312 oil leakage 320 cover 321a 331 radiator fan 332 Radiator core 332 Radiator core 350 Bonnet 350 Bonnet 354 Dwelled aircraft 355a Opening 356 Engine room 356 Fuel Tank 362 Groove 363 Tank accommodation space id Tilt direction

Claims (7)

The space in the soundproof box formed by the frame and the bonnet covering the frame is divided into an engine compartment in which the engine and the main body of the working machine are accommodated by a vertical partition wall, and the cooling air after cooling the engine compartment is introduced. partition into an exhaust chamber where the
The engine compartment communicates with the exhaust chamber through an opening provided in the partition wall, and the exhaust chamber is opened to the outside of the machine through an exhaust port formed in the top plate of the bonnet,
A bottomed leaking oil sump that opens upward is formed in the space within the frame from the lower position of the exhaust chamber to the lower position of the engine room, and a frame plate surrounds the open portion of the leaking oil sump. Standing on the frame,
An engine-driven work machine in which the open portion of the leaking oil reservoir below the exhaust chamber is covered with a cover, and a tank housing space is formed below the exhaust chamber by the cover and is isolated from the upper space. ，
on the cover,
a top plate having an inclined portion that slopes upward in a direction away from the partition wall and partitions the tank housing space below the exhaust chamber from the exhaust chamber above the exhaust chamber;
a side plate protruding downward from a side edge of the upper plate parallel to the direction of inclination of the inclined portion in a plan view and having a lower end positioned outside the frame plate;
Rainwater is prevented from dropping from the lower end of the inclined portion by making the lower end of the inclined portion abut against the partition wall or equipment attached to the partition wall in a watertight manner, and the upper surface of the intermediate position in the direction of inclination of the inclined portion and a guide body for regulating the flow of rainwater toward the partition wall side and guiding it to the outside of the side plate projecting downward from at least one of the side walls. . 2. The engine-driven working machine according to claim 1, wherein said guide body is formed of a shape member attached to said inclined portion in a direction intersecting the inclined direction of said inclined portion. 2. The engine driving work according to claim 1, wherein said upper surface plate of said cover is a metal plate, and said guide body is formed by a groove or a ridge formed in a direction crossing the inclination direction of said inclined portion. machine. 2. The guide body is provided with a wind guide surface for guiding the flow of cooling air introduced into the exhaust chamber through the opening of the partition wall toward the exhaust port. 3. The engine-driven work machine according to any one of 3. 2. The guide body is provided on the inclined portion in a shape bent at the center in the longitudinal direction so that both ends of the guide body are positioned lower than the center in the longitudinal direction of the guide body. 5. The engine-driven work machine according to any one of 1 to 4. a horizontal portion extending horizontally from the upper end of the inclined portion is provided on the top plate of the cover;
The engine-driven work according to any one of claims 1 to 5, characterized in that a water stop plate is provided at an end portion of the horizontal portion on the inclined portion side to restrict rainwater from flowing into the inclined portion side. machine. The frame at the position where the frame plate is formed is provided with a flange protruding toward the outer circumference, the lower end of the side plate of the cover is placed on the flange, and the lower end of the side wall of the bonnet is placed outside the side plate. The engine-driven working machine according to any one of claims 1 to 6, characterized in that the bonnet is joined to or arranged close to the flange, and a drain hole is provided in a lower end portion of a side wall of the flange and/or the bonnet.

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