JPH09158745A - Engine driven working device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a compact structure and excellent cooling effect in a structure in which an engine driven working device is built in a box. SOLUTION: A bonnet 1 is demarcated into an engine room ER in which an engine driven working device is built in, and a sucked air chamber SR to be formed by a sucked air duct 2, the engine cooling air is introduced into the engine room ER from the sucked air chamber SR by a suction type radiator R, an intercooler IC, and a working fluid cooler HOC are arranged opposite to an air suction face of the radiator R in the sucked air chamber SR, and a fuel tank is arranged below the sucked air duct 2 and the radiator R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure, a compact structure, and a cooling structure in an engine-driven work device in which a work device, for example, a hydraulic pump or other hydraulic work device, or a generator is connected to an engine output shaft. Simplified structure,
Furthermore, it relates to a device support structure.

[0002]

2. Description of the Related Art An example of a structure in which an engine-driven working device is built in a box and packaged is shown in FIG. This structure will be briefly described. The entire body is covered with a soundproof bonnet 1 ', and the front side of the bonnet 1'in the figure is the intake side 1'a.
As a result, a large number of slits 1'b for introducing air are formed. Among them, the front side in the drawing is an engine room ER 'in which an engine-driven working device is installed, and the rear side through the radiator R'is a control panel CP', a hydraulic oil tank HOT ', a hydraulic oil cooler HOC. ', Fuel tank FO
It is a low temperature air chamber LR where T'and the exhaust port 1'c are arranged. A common base 3 ', on which all members are mounted and installed, is laid at the bottom.

In the engine room ER ', the engine E'is vibration-proof supported on the common base 3'through a vibration-proof rubber 13'. A gearbox GB is formed on the output shaft side of the engine E ', and a dual hydraulic pump, that is, a low pressure pump P1' and a high pressure pump P2 'are connected to the engine E'through the gearbox GB. Are arranged in parallel with each other, and these are also vibration-isolated and supported by the common base 3'by the vibration isolation rubber 13 'independently of the engine E'. Further, the gearbox GB has an auxiliary hydraulic pump mounting shaft G
Ba is provided in a protruding manner, and in this embodiment, the generator D is driven by belt transmission from the other power take-off shaft. Thus, the engine-driven working device is constructed.

Similarly, in the engine room ER ',
The common base 3'is parallel to the engine-driven working device.
Is equipped with a battery B ', and an exhaust muffler EM' is disposed above the engine-driven working device and the radiator R ', and the ceiling of the bonnet 1'in the low temperature air chamber behind the radiator R'. Exhaust port 1'b formed in
Exhaust pipe EP 'is extended with respect to.

[0005]

In the conventional box-built-in type engine-driven working apparatus shown in FIG. 11, the cooling mechanism, the simplification and compactness of the structure, and the supporting structure thereof are not enough. There is a problem. First, the cooling structure will be described. In the engine-driven working apparatus shown in FIG. 11, a discharge-type radiator is used as the radiator R'for cooling the engine inside. That is, engine E '
Radiator air is drawn into the radiator fan RF ′ included in the engine from the engine room ER ′ in which the engine-driven working device is installed. In this structure, the temperature around the control panel CP 'in the engine room ER' is relatively high. In addition, the low temperature air chamber L separated by the partition wall
The hydraulic oil cooler HOC 'installed at R is the engine E'
Since it is not possible to cool with intake air by the radiator fan RF 'included in the above, it is necessary to have a unique cooler fan, which raises the cost of the hydraulic oil cooler HOC' and the need to secure a power source for the cooler fan.

If the radiator R'is assumed to be a suction type radiator, a partition wall is attached around the radiator,
As an intake air chamber for the radiator, an intake duct isolated from the engine room may be installed inside the box (bonnet 1 '). First, in the engine room, the temperature rises by passing through the radiator. If the air in the intake air chamber is not sufficiently cooled, the cooling effect in the engine room is small. In addition, this is a structure that wraps around through the gaps between the piping around the engine, the wiring, and the inner wall of the box (bonnet 1 '), has a large air passage resistance, and is an engine-driven working device in the engine room, etc. The cooling effect on each of the parts is weak, and the engine performance itself may deteriorate.

Next, problems in terms of compactness and structure simplification will be described. First, hydraulic oil cooler HO
Regarding C ′, since it is an air-cooled type, it is necessary to attach a fan for sucking outside air, which leads to high cost and expansion of installation space. If the intake air of the radiator fan is available, this fan arrangement can be eliminated. Other than that, the hydraulic oil tank HOT and the fuel tank FOT have a space for the exclusive use in the bonnet 1'in the horizontal direction, so that the bonnet 1'is inevitably expanded.

In the support structure for the engine-driven working device, the engine E'and the hydraulic pumps P1 'and P
Since the work devices such as 2'and the generator D are arranged in parallel with each other through the gear box GB, a bending moment is apt to occur in the direct connection portion between the engine output shaft and the gear box GB, and the vibration-proof support is provided. In the structure, the disposition position of the anti-vibration rubber must be carefully considered. In addition, an installation space and cost are required for the installation of the gear box GB.

[0009]

The present invention uses the following means to solve the above problems. That is, as in claim 1, an intake duct that is isolated from the engine room in which the engine-driven working device is installed is provided inside the box, and an intake air chamber is formed in the intake duct, and suction is performed from the intake air chamber. In a structure in which cooling air is introduced into the engine room via a type radiator, a necessary heat exchanger other than the radiator is internally provided in the intake air chamber.

According to a second aspect of the present invention, an intake duct is provided inside the box, which is isolated from the engine room in which the engine-driven working device is installed, and an intake air chamber is formed inside the intake duct. In a structure in which cooling air is introduced into the engine room from a room through a suction radiator, the control panel of the engine-driven working device is arranged in the intake duct, and its operating portion is directed to the intake side surface of the box body. .

According to a third aspect of the present invention, in the structure of the first aspect, an air cooling heat exchanger and a hydraulic oil cooler are arranged in the intake air chamber so as to cover the entire air intake surface of the radiator. Set up.

According to a fourth aspect of the present invention, in the structure according to the third aspect, a fuel tank is arranged in the intake air chamber below the air cooling heat exchanger and the hydraulic oil cooler,
With these three parts, the suction duct, and the inner wall of the box,
Form an air cooling chamber.

According to a fifth aspect of the invention, in the structure according to the fourth aspect, the air-cooling heat exchanger, the hydraulic oil cooler, and the radiator are arranged on the fuel tank.

According to the sixth aspect of the present invention, in the structure in which the engine-driven hydraulic working device is installed in the box body, the hydraulic oil tank is arranged above the hydraulic working device directly connected to the engine.

According to a seventh aspect, in the structure according to the sixth aspect, a portion surrounded by the inner wall of the box and the hydraulic oil tank is an exhaust duct.

Further, in the engine-driven working device in which the working device is directly connected to the engine, the leg material for mounting the engine is extended and the working device is attached to the extended portion.

According to a ninth aspect of the present invention, in the structure according to the eighth aspect, the extended portion of the leg member to which the working device is attached is vibration-isolated and supported.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the accompanying drawings. 1 is an internal side view of a box-embedded engine-driven working device, FIG. 2 is an internal plan view of the same, and FIG. 3 is a front view of the bonnet 1 seen from the intake side surface 1a side.
FIG. 4 is a front view of the inside of the intake duct 2, and FIG. 5 is a control panel C.
Intake duct 2 showing the arrangement structure of P and fuel tank FOT
A side view of the part, FIG. 6 is an internal plan view of the control panel room CR,
7 is a side view of the inside of the direct connection member 14, FIG. 8 is a perspective view showing a method of attaching the protective cover 16 for preventing leakage and scattering to the flange F, FIG. 9 is a plan view of the protective cover 16, and FIG. FIG. 8 is a side sectional view showing the sewing of and the attachment of the wire 17;

The overall construction of the box-type engine-driven working apparatus will be described with reference to FIGS. 1 to 6. The box body that covers the entire body is a soundproof bonnet 1, and most of the inside is an engine room ER, which is a room for installing an engine-driven working device in which various working devices are connected to the engine E. On the upper side (right side in FIG. 1) of the engine E, an intake duct 2 forming a double-structured box with the bonnet 1 is internally provided, and the intake duct 2 is isolated by a partition wall 2b. Thus forming an intake air chamber SR and a control panel chamber CR. Then, the air suction surface of the radiator R is attached to a portion of the side plate (partition side plate 2a) forming a partition with the engine room ER of the intake duct 2 facing the intake air chamber SR, and in the engine room ER, A radiator fan RF arranged on the lower side of the radiator R faces the engine E.
With such a configuration, the air taken into the radiator R from the intake air chamber SR is sent around the engine E as engine cooling air. In addition, a heat insulating material 6 such as a foaming sponge material is provided between the edge of the partition wall side plate 2a and the inner surface of the bonnet 1.
The engine room ER is located between the outer surface and the inner surface of the bonnet 1.
Hot air from the inside enters and warms the intake duct 2,
This prevents the internal intake air chamber SR from becoming hot.

In the lower part of the bonnet 1, side frames 4 of U-shaped steel material in cross section are arranged in parallel to the left and right, and the lower end portions of both side plates of the bonnet 1 are attached. A common base 3 is formed between the side frames 4 and 4. (The side frame 4 shown in FIG. 1 is the side frame 4 on the opposite side.) The common base 3 is a part of the engine room ER from below the intake duct 2 (a part below the radiator R and the radiator fan RF).
The lower part 3b is formed to be a space for arranging the fuel tank FOT, and the other parts in the engine room ER are the upper part 3a, which is one step higher. The battery B is mounted and supported. It should be noted that a U-shaped steel material is also disposed at an appropriate position in the lower floor portion of the upper stage portion 3a of the common base 3 to reinforce it. Further, the stanchions 5, 5 are erected from the central portions of both side frames 4, 4 to reinforce the bonnet 1.

Next, the structures of the intake air chamber SR and the control panel chamber CR formed in the intake duct 2 will be described. First, in the intake air chamber SR, the right end surfaces of the intake duct 2 and the bonnet 1 in FIG. 1 are intake side surfaces, and the intake side surface 1a of the bonnet 1 has slits for intake of air as shown in FIG. 1b, 1b ... are drilled,
The intake side surface of the intake duct 2 has the same structure. The air in the intake air chamber SR sucked from these intake side surfaces is first used as engine intake air, and the inlet portion of the intake pipe SP of the engine E is introduced into the intake duct 2. The other is used as a radiator wind, and is sucked from the air suction surface of the radiator R attached to the side wall 2a of the partition wall as described above, and is used for heat exchange of the radiator R, and then rearward via the radiator fan RF. And used as cooling air in the engine room ER.

Since the radiator R of the intake air chamber SR is a suction type radiator that sucks air from the intake air chamber SR to the engine room ER, high temperature air from the engine room ER does not enter, and as described above, The structure such as the heat insulating material 6 prevents the intake duct 2 from being heated to a high temperature by the air from the engine room ER, and further, a fuel tank FOT under the floor of the intake duct 2 is filled with a fuel that does not heat so much. Is installed, the intake air chamber S
It has the effect of preventing the temperature of R from rising. (On the other hand, since the fuel tank FOT side is also close to the low temperature intake duct 2, the fuel is kept at room temperature or low temperature without increasing in temperature.) Therefore, it is arranged in the engine room ER. As a result, a defective component that does not provide a cooling effect is arranged in the intake air chamber SR.

First, a hydraulic oil cooler HOC for cooling the hydraulic oil of the hydraulic working apparatus provided with the engine driven hydraulic working apparatus is provided as a kind of the engine driven working apparatus. Further, further above that, the air introduced into the radiator R is cooled to improve the heat exchange rate of the radiator R, and at the same time, cool the engine cooling air sent through the radiator fan RF to reduce the cooling effect. Intercooler (heat exchanger for air cooling) IC
Are arranged. The hydraulic oil cooler HOC and the intercooler IC are arranged so as to face the air suction surface of the radiator R attached to the partition wall side plate 2a, and the total amount of air sucked into the radiator R is directly applied to these. Passing through the parts, both coolers HOC / IC
Enhances the cooling effect of. By arranging these vertically, the installation space does not expand in the horizontal direction, which contributes to downsizing of the intake duct 2.

Then, as shown in FIGS. 2 to 6, in the intake duct 2, the partition wall 2b is provided on the left side of the intake air chamber SR in FIG. 3 and FIG. C
R is formed, and the control panel CP is arranged in this. The control panel CP has a microcomputer and the like, and it is further required that the ambient temperature is low. However, in the intake duct 2, the air in the control panel CR adjacent to the intake air chamber SR is As described above, since the high temperature is avoided, it is an optimum installation space.

In the control panel chamber CR, the intake side surface of the intake duct 2 and the intake side surface 1a of the bonnet 1 are cut out, and the control panel door CD is arranged at the cutout portion of the intake side surface 1a of the bonnet 1. doing. The control panel C
The operation portion of P is oriented toward the control panel door CD, that is, toward the intake side surface, and is slidably mounted on the left and right slide rails 7 shown in FIG. 4 and FIG. It can be pulled out to
When the control panel door CD is opened, the control panel C is moved horizontally.
It is possible to slide P to take it out and perform maintenance work on the inside of the control panel CP from the side. Further, as shown in FIGS. 5 and 6, the intake side surface 1 of the bonnet 1
A receiving plate 8 having an L-shape in plan view is provided inside the both side edges of the control panel door CD in a.
8 is additionally provided with rubber plates 8a, 8a, and when the control panel CP is stored, as shown in FIG. 6, the side plate of the operation portion of the control panel CP is pressed against the rubber plates 8a, 8a for storage. It is what is done.

Further, as shown in FIGS. 3 to 5, on the intake side surface 1a of the bonnet 1, below the control panel CP in the control panel chamber CR is a drawer portion of the fuel filler port 10 of the fuel tank FOT. A refueling door 9 is disposed below the control panel door CD on the intake side surface of the bonnet 1. The fuel tank FOT is installed in the space below the intake duct 2 and the radiator R as described above. The radiator R does not need to have a large vertical length, and the installation space for the hydraulic oil cooler HOC and the intercooler IC, which are arranged to face the radiator R, need not be so long vertically. From this, nature, radiator R
And an excess space is created above or below both coolers HOC / IC. In this embodiment, a surplus space is arranged below them to secure a space for disposing the fuel tank FTO. Therefore, unlike the conventional technique, a disposing space dedicated to the fuel tank is not provided horizontally, and the bonnet 1 is provided. This contributes to downsizing of the entire device covered by the coating.

Since the control panel CP is arranged on the left side of the bonnet 1 in FIG. 4, the hydraulic oil cooler HOC and the intercooler IC, and the radiator R arranged facing them are shown in FIG. Unevenly distributed on the right side. Therefore, in the engine room ER, in order to face the radiator fan RF arranged on the lower side of the radiator R, the entire engine-driven working apparatus including the engine E is
It is unevenly distributed on the right side in FIG. Therefore, in the engine room ER, as shown in FIG. 2, a large space is created on one side of the engine-driven working device, that is, on the side where the control panel CP is arranged, and the cooling air from the radiator fan RF is used in this space. A large amount of air is blown toward. Providing a space in which a large amount of air is blown in this way makes it possible to secure a sufficient amount of cooling air and to expect a cooling effect in the engine room ER and the engine-driven working apparatus as a whole. Further, in this space, the battery B is arranged as shown in FIG. 2, and the cooling effect of the battery B is obtained.

Intake air chamber S formed in the intake duct 2
The structure of the R and the control panel room CR has been described above.
Next, each structure in the engine room ER will be described. First, the structure of the engine-driven working device itself will be described. In this embodiment, as shown in FIGS. 1 and 2, an engine-driven hydraulic working device is configured by connecting a tandem pump including hydraulic pumps P1 and P2 in series on the output shaft of the engine E. . Between the output shaft portion of the engine E and the upper hydraulic pump P1 of the tandem pump, as shown in FIG.
The direct coupling member 14 having the structure as described above is interposed, and the pump shaft PS of the hydraulic pump P1 is internally fitted and fixed to the coupling 14a provided in the direct coupling member 14 and attached to the output shaft of the engine E. The flywheel FW is fitted with a coupling. Further, a power take-off shaft is projectingly provided on the lower side of the lower side hydraulic pump P2 of the tandem pump so that the hydraulic pump OP can be optionally attached.

In this way, the working device (hydraulic pumps P1 and P
Since the engine-driven working device in which 2) is directly connected is not provided with a gear box unlike the prior art, a bending moment does not occur, and the entire engine-driven working device may be vibration-proof supported. The vibration support structure is simplified. Further, the space and cost corresponding to the gearbox arrangement are reduced. However, on the other hand, since the working device is arranged in a direct connection in the engine output shaft direction, a twisting moment is likely to be generated at the portion where the working device (hydraulic pump P1) is mounted on the output shaft.
In order to suppress this, it is necessary to increase the rigidity of the integrated structure of the engine E and the working device.

In the present embodiment, in order to realize this improvement in rigidity at a low cost without increasing the number of parts, the engine E
Attach the mounting legs 12 of the work device (hydraulic pump P1.
The hydraulic pumps P1 and P2 are directly attached to the extending portions of the mounting leg members 12 and 12 by extending in the P2) direction. With such a structure, the engine E and the hydraulic pump P1
P2 and P2 can be made into a highly rigid integral structure. Also,
The mounting leg members 12, 12 are attached to the engine E at a mounting portion.
It is vibration-isolated and supported by the common base 3 (upper part 3a) via the vibration-damping rubbers 13a, 13a, and is also extended by the vibration-proof rubbers 13b, 13b at the extended portion for mounting the working device. 3 is vibration-proof supported. In other words, in the conventional structure in which the engine and the working device are arranged in parallel, it is necessary to independently support the engine and the working device in a vibration-proof manner, and the number of places where the vibration-proof rubber is arranged is increased. In the present embodiment, the engine E and the working device are attached to the left and right mounting legs 12 respectively.
・ Because it is integrated at 12, and twisting is less likely to occur, there are only four places in total, two places in front and two places in the rear, that is, the vibration-proof support structure is simplified. It is.

As described above, since the engine E mounting portion and the working device mounting portion are integrally vibration-isolated and supported by the mounting leg members 12 and 12, the engine E and the working device are connected in advance and integrated. Without mounting the engine E first, the mounting legs 12
・ Installed on 12 and then working device (hydraulic pump P1
・ Even if P2) is attached, the anti-vibration effect does not change. Therefore, replacement work of only the working device, for example, the hydraulic pump P1.
Exchange work such as replacing the generator from P2 becomes easy.

When the hydraulic pumps P1 and P2 are used as working devices, a location for the hydraulic oil tank is required. In this embodiment, however, in the engine room ER,
A hydraulic oil tank mount 15 is provided, and a hydraulic oil tank HOT is mounted on it. The leg portions 15a, 15a ... Of the hydraulic oil tank mount 15 are formed on both side frames 4 ,.
4, the hydraulic oil tank stand 15 is erected in a state of being installed on the hydraulic pumps P1 and P2 of the working device. The mounting portion of the hydraulic oil tank HOT of the hydraulic oil tank mount 15 is at a low position because the hydraulic pumps P1 and P2 are not so high upward, and therefore, between the portion and the ceiling portion of the bonnet 1, It is possible to secure a sufficient location for the hydraulic oil tank HOT.
It is not necessary to expand the space in the horizontal direction in order to secure the installation space, which contributes to downsizing of the bonnet 1.

Next, the intake and exhaust structures will be described. As shown in FIGS. 1 and 2, the intake pipe SP extending from the air cleaner AC has its inlet introduced into the intake air chamber SR in the intake duct 2 as described above, and the inner surface of the bonnet 1 and the intake duct 2 are introduced. Due to the heat insulating structure between the outer surface, the fuel tank FOT, the hydraulic oil cooler HOC, and the intercooler IC, the air that is sufficiently cooled in the intake air chamber SR, which is the air cooling chamber, is supplied. Because it is introduced as intake air, inside the engine (cylinder, etc.)
Can be improved in durability.

Next, the exhaust structure will be described with reference to FIG.
As shown in FIG. 3 and FIG. 3, the exhaust pipe EP1 extends from the exhaust flange EF above the engine E, and the exhaust muffler EM is disposed above the engine E. The exhaust muffler EM is disposed at the lower part of the engine E, at the upper and both sides by the ceiling surface and both side surfaces of the bonnet 1, and at the front and rear sides of the partition wall side surface 2a of the intake duct 2 and the hydraulic oil tank HOT. Surrounded by one side, space as an exhaust duct is secured, there is no need to provide an exhaust duct with another structure,
Contributes to compactness and simplification of structure. An exhaust pipe EP2 extends from the exhaust muffler EM toward an exhaust port formed in the ceiling of the bonnet 1.

Finally, the leakage and scattering prevention structure of the flange portion will be described with reference to FIGS. Flange in various pipes (for water distribution or oil supply) has a problem of scattering of fluid due to leakage, but in the past, a metal cover was used.
It was fixed by tightening the bolts together with the flange. The metal cover is divided into two parts, and further, it is necessary to manufacture each of the flanges in the same size, the cost is high, and the number of assembling steps per flange is also required.

In this embodiment, the protective cover 16 is attached to the flange portion to prevent fluid leakage and scattering. The material of the protective cover 16 is glass fiber coated with silicon coating which is fireproof, heatproof, flameproof and waterproof. First, the protective cover 16 is folded in two as shown in FIG. 10A, and the folded portions at both ends are sewn in a tubular shape as shown in FIG. ),
The wires 17 and 17 are passed through the cylinder formed in this way to obtain the structure shown in FIG.

The process of coating the flange F with the protective cover 16 will be described with reference to FIG. At first, like (a),
The protective cover 16 is applied to the outer peripheral curved surface of the flange F and wound. Next, as shown in (b), the wires 17
When is pulled strongly outward, both ends are squeezed and wound around the flat portion of the flange F. Thus, the protective cover 16
Is evenly wound around the outer peripheral curved surface and the flat surface of the flange F, and when both ends are sufficiently squeezed, the externally exposed portions of both the wires 17 are twisted and tightly bound.

As described above, the protective cover 16 is low in cost in terms of material, and even if the size of the flange F varies to some extent, it can be wrapped around the flange F to fit the size of the flange F. And the duality is effective. Since it is not necessary to fasten bolts and the like, and the number of assembling steps is reduced, it is possible to attach a large number of protective covers 14 to the flange in a short time.

[0039]

As described above, the present invention has the following advantages. That is, in the structure in which the engine-driven working device is provided in the box body and the intake air chamber is formed by the intake duct that is isolated from the engine room, the intake air chamber is separated from the engine room by using the configuration according to claim 1. Since the air is isolated and the air in the intake air chamber is further introduced into the engine room by the suction radiator, the hot air that has passed through the engine room does not enter the intake air chamber. In such a structure, disposing the heat exchanger in the intake air chamber improves the heat exchange ratio as compared with disposing it in the engine room where the temperature rises.

Similarly, in the structure in which the engine-driven working device is provided in the box body and the intake duct is provided to be isolated from the engine room, the ambient temperature is required to be low by constructing as in claim 2. A control panel is arranged in the intake duct to improve temperature conditions and ensure good engine control.

Further, in the constitution according to claim 1, by constructing according to claim 3, the total amount of air in the intake air chamber sucked into the radiator hits the air-cooling heat exchanger and the hydraulic oil cooler, and these members are provided. The cooling effect in the engine is improved, and as a result, the cooling effect of the radiator by lowering the temperature of the air introduced into the radiator and the cooling effect of the engine room cooling air blown from the radiator are improved, and the cooling effect of the hydraulic oil is also improved.

According to the third aspect of the present invention, by constructing as in the fourth aspect, the temperature of the fuel in the fuel tank is prevented from increasing in temperature, and the air cooling chamber thus formed is hermetically sealed. The air in the engine room does not enter, and the air in the air cooling chamber used as intake air, radiator intake air, or as hydraulic oil cooling can be kept at a low temperature, and a good cooling effect can be obtained in all directions.

In addition, in the configuration of claim 4, claim 5
Like air-cooling heat exchanger and hydraulic oil cooler,
By securing the space below the radiator mounting part as it is as the fuel tank installation space, there is no need to separately expand the fuel tank installation space horizontally, and the entire box housing the engine-driven working device. Contribute to the compactness of.

Next, in the structure in which the engine-driven hydraulic working device is arranged in the box body, by constructing as in claim 6, the hydraulic oil tank is arranged in the surplus space above the hydraulic working device and separately. There is no need to horizontally expand the space for arranging the hydraulic oil tank, which contributes to downsizing of the entire box that houses the engine-driven working device.

Further, in the configuration of claim 6, claim 7
With such a configuration, it is not necessary to separately provide an exhaust duct, which contributes to downsizing of the entire box body.

Next, in constructing the engine-driven working device, by constructing as in claim 8, the engine and the working device become an integral structure, and the working device is formed by the connection through the leg members. The rigidity of the portion directly connected to the engine is improved, and the influence on the engine output shaft is reduced. Further, as compared with the structure in which the work devices are arranged in parallel with the engine via the gear box, the work devices are arranged in series on the engine output shaft, so that a gear box having a complicated structure is not required. Well, it contributes to downsizing and cost reduction by reducing the installation space.

If the working device is attached to the extended portion of the leg member, it is attached to the engine in an integrated structure. First, the engine alone is attached to the leg member, and then the generator, hydraulic pump, etc. It becomes possible to optionally assemble the working device according to the application.

Further, in the structure of claim 8, claim 9
With such a structure, if the extended portion of the leg member is vibration-isolated and supported, the integrated engine and the entire working device can be vibration-isolated and supported. It was not necessary to consider the suppression of the bending moment on the engine output shaft, which had to be considered by independently supporting the engine and the work device separately when they were installed in a circular shape. The structure is very simple and has a sufficient vibration damping effect.

[Brief description of the drawings]

FIG. 1 is an internal side view of a box-embedded engine-driven working device.

FIG. 2 is likewise an internal plan view.

FIG. 3 is a front view of the bonnet 1 as viewed from the intake side surface 1a side.

FIG. 4 is an internal front view of the intake duct 2.

FIG. 5 is a side view of an intake duct 2 portion showing an arrangement structure of a control panel CP and a fuel tank FOT.

FIG. 6 is an internal plan view of a control panel room CR.

7 is an internal side view of the direct connection member 14. FIG.

FIG. 8: Flange F of the protective cover 16 for preventing leakage and scattering
It is a perspective view which shows the attachment method to this.

9 is a plan view of the protective cover 16. FIG.

FIG. 10 is a side sectional view showing the sewing of the protective cover 16 and the attachment of the wire 17;

FIG. 11 is an internal perspective view of a conventional engine-driven working apparatus with a built-in box body.

[Explanation of symbols]

 E engine P1 ・ P2 hydraulic pump R radiator RF radiator fan HOT hydraulic oil tank HOC hydraulic oil cooler FOT fuel tank IC intercooler SP intake pipe EP1 ・ EP2 exhaust pipe EM muffler ER engine room SR intake air chamber CR control panel room 1 bonnet 1a intake Side 2 Air intake duct 2a Bulkhead Side 2b Bulkhead 3 Common base 6 Heat insulating material 12 Mounting legs 13a / 13b Anti-vibration rubber 14 Direct connection member 15 Hydraulic oil tank stand

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F01P 5/06 511 F01P 5/06 511A 511B F02B 67/00 F02B 67/00 D 77/13 77 / 13 L F16M 3/00 F16M 3/00 Q 5/00 5/00 AD

Claims (9)

[Claims] 1. An air intake duct, which is isolated from an engine room in which an engine-driven working device is installed, is formed inside a box body to form an intake air chamber therein, and a suction radiator is provided from the intake air chamber. In a structure for introducing cooling air into an engine room via the engine room, a necessary heat exchanger other than a radiator is internally provided in the intake air chamber. 2. An air intake duct, which is isolated from the engine room in which the engine-driven working device is installed, is provided inside the box body to form an intake air chamber therein, and a suction radiator is provided from the intake air chamber. In a structure in which cooling air is introduced into an engine room via an engine, the control panel of the engine-driven working device is disposed in the intake duct, and the operating portion is directed to the intake side surface of the box body. Driven work device. 3. The structure according to claim 1, wherein an air-cooling heat exchanger and a hydraulic oil cooler are arranged in the intake air chamber so as to cover the entire air intake surface of the radiator. Engine-driven work equipment that 4. The structure according to claim 3, wherein a fuel tank is disposed below the air cooling heat exchanger and the hydraulic oil cooler in the intake air chamber, and these three parts and an intake duct are provided. An engine-driven working device characterized in that an air cooling chamber is formed by the box inner wall. 5. The structure according to claim 4, wherein the air-cooling heat exchanger, the hydraulic oil cooler are provided on the fuel tank.
And an engine-driven working device comprising the radiator. 6. An engine-driven working device in which a hydraulic oil tank is arranged above a hydraulic working device directly connected to the engine in a structure in which an engine-driven hydraulic working device is installed in a box body. 7. The engine-driven working apparatus according to claim 6, wherein a portion surrounded by the box inner wall and the hydraulic oil tank is an exhaust duct. 8. An engine drive type working device in which a working device is directly connected to an engine, characterized in that leg members for mounting the engine are extended and the working device is attached to the extended portion. Work equipment. 9. The engine-driven work device according to claim 8, wherein the extended portion of the leg member to which the work device is attached is vibration-isolated and supported.