JPH11208290A - Cooling mechanism for engine or the like in running work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rear view by lowering an engine cover, and cooling efficiency of a cooling unit and an engine or the like, and to facilitate work by reducing noise, with regard to a cooling mechanism for an engine or the like in a running work machine. SOLUTION: In this running work machine, a plurality of girders 4 protrude in the longitudinal directions at the center of a unit mount with a running unit. On the unit mount, an engine 7 and a hydraulic device such as a hydraulic pump 8 or the like are installed in the longitudinal directions along one side of the girder 4. On the other side of the girder 4, a driving seat 15 is arranged. In addition, a cooling unit 10 composed of a radiator and a cooler for cooling hydraulic device is installed at almost above at least one of the girders 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling mechanism such as an engine, a hydraulic device, and a cooling device in a traveling work machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art Conventionally, a traveling work machine having a front working section such as a hydraulic shovel or the like for performing heavy excavation work is, as shown in FIGS. A plurality of vertical girders (auxiliary ribs) 4 for mounting 5 are provided so as to project at a predetermined height in the front-rear direction, so that the machine base 3 has sufficient strength.

As shown in FIGS. 9 to 11, an engine 7 mounted on such a traveling work machine 1 is arranged at a rear portion of the machine base 3 so as to straddle above the stringer 4 and the engine 7
Is horizontally provided with a gap so as not to contact the stringer 4, and a counter weight 6 is provided at the rear thereof.
Therefore, the height of the engine hood 9a and the like that covers the engine 7 is formed higher than the cover 9 that covers other devices. The radiator 10a and the cooler 10b for cooling the hydraulic oil are arranged so as to be cooled by a fan 10c driven by a belt from the crankshaft of the engine 7.

[0004]

However, in the above-mentioned conventional engine 7 and hydraulic pump 8 and the cooling mechanism of the related equipment, the engine hood 9a covering the engine 7 has the engine 7 installed above the stringer 4. Driver's seat 1
5, there is a problem that the rearward view of the operator 5 is obstructed, which impairs the rear view of the operator and makes the work difficult.

Further, since the fan 10c of the cooling device 10 is directly belt-conducted from the engine 7, if the fan 10c is rotated at a high speed to increase the cooling air flow in order to increase the cooling efficiency, the rotation of the engine 7 is rotated at a high speed. However, there is a drawback that the heat balance performance is inconvenient, resulting in difficulty in efficient cooling, and that the noise level increases and it is difficult to perform comfortable work.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it has been made possible to improve the rear view by lowering an engine cover, improve the cooling efficiency of a cooling device and an engine, and reduce noise. An object of the present invention is to provide a cooling mechanism for an engine or the like in a traveling work machine capable of easily performing maintenance work on an engine and a hydraulic drive unit while performing work easily.

[0007]

According to the present invention, a cooling mechanism for an engine or the like in a traveling working machine according to the present invention has a plurality of longitudinal beams projecting from the center of a machine having a traveling device in the front-rear direction. In the traveling work machine installed, an engine, a hydraulic pump, and the like are provided on the machine base in a front-rear direction along one side of the stringer, and a driver's seat is installed on the other side of the stringer, A cooling device including a radiator for cooling the engine and a cooler for cooling hydraulic oil is provided substantially above at least one of the plurality of stringers.

According to a second aspect of the present invention, there is provided a cooling mechanism for an engine or the like in a traveling work machine according to the first aspect of the present invention, wherein the cooling mechanism is provided so as to substantially straddle at least one of the plurality of stringers. The apparatus is characterized by being provided. According to a third aspect of the present invention, there is provided a cooling mechanism for an engine or the like in the traveling work machine according to the first or second aspect, further comprising a cooling fan for cooling the engine and driving means for driving the cooling fan. It is characterized by:

According to a fourth aspect of the present invention, there is provided a cooling mechanism for an engine or the like in the traveling work machine according to any one of the first to third aspects, wherein the engine room of the engine is heated in the engine room. An ejector for discharging air to the outside is provided. According to a fifth aspect of the present invention, there is provided a cooling mechanism for an engine or the like in a traveling work machine according to the fourth aspect, wherein intake noise suppressing means is provided at an intake port of the engine room.

According to a sixth aspect of the present invention, there is provided a cooling mechanism for an engine or the like in the traveling work machine according to any one of the first to fifth aspects, wherein the engine room is provided at least substantially densely around the engine. It is characterized by being constituted by a surrounding enclosure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory diagram showing a plan view of a machine base configuration of a hydraulic shovel showing an embodiment of the present invention,
FIG. 2 is an arrow view showing a cross section along the line 2A-2A in FIG.
3 is an arrow view showing a cross section along the line 3A-3A in FIG. 1, FIG. 4 is an arrow view showing a cross section along the line 4A-4A in FIG.
Is an arrow view showing a cross section along line 5A-5A in FIG. 1, FIG. 6 is an application example of the embodiment of the present invention, and is an explanatory view showing a state similar to FIG. 3, and FIG. FIG. 14 is a modified example applicable to the application example, and is an explanatory diagram showing a state similar to FIG.
FIG. 8 is a left side view showing a hydraulic shovel to which a cooling mechanism such as an engine in the traveling work machine of the present invention is applied.

As shown in FIG. 8, a traveling work machine, that is, a hydraulic shovel 1 according to an embodiment of the present invention horizontally rotates a machine base 3 as a swing frame to a crawler type traveling device 2 via a swivel bearing device 2a. 1, a left girder 4L and a right girder 4R, which are vertical girders 4 with an interval H, are protrudingly provided in the center of the base 3 as shown in FIG. The left vertical girder 4L and the right vertical girder 4R are provided with a front working part 5 having a bucket 5a at a front end with a raised front and a lowered rear, and a counterweight 6 also serving as a bumper provided at a rear part. It is standing.

[0013] Then, as shown in FIGS.
The engine 7 and the hydraulic pump 8 directly connected via the connector 7a are mounted on the machine base 3 via the engine bracket BK in the front-rear direction along the right side of the right vertical girder 4R, and a counter surrounding these. An engine room ER is formed by the weight 6, the partition E, and the cover 9. The cover 9 covers the partitions E 1, E 2 of the engine room ER and the upper opening and the side opening of the counterweight 6, and has an appropriate air outlet.
Covered in a closed shape. The cover 9 is composed of an upper cover 9u and side portions 9s.

Reference numeral 7b denotes an intake pipe of the engine 7, and an exhaust pipe 7c is a hole 6a formed above the counterweight 6.
And exhaust while suppressing noise. Reference numeral 9c denotes a blower that blows air into the cover 9 through the air guide tube 9b. The blower may be any as long as it can cool the engine 7, the hydraulic pump 8, the engine room ER, and the like, and may be, for example, a cooling fan.

After being taken in by the cooling fan 9c to cool the engine 7, the hydraulic pump 8, the engine room ER, etc., the outlet 4 on the upper part of the cover 9 behind the engine 7 is provided.
7b, discharged from the outlet 47a of the side cover 9s.
The partition E1 of the engine room ER is a right-hand vertical girder 4R.
And may also be configured.

Also, as shown in FIG. 3 and FIG.
In the present embodiment, the cooling device 10 is installed on the upper side of at least one of the right and left vertical girders 4R and on the front side of the counter weight 6 via the bracket BT substantially above both of the vertical girders 4L and 4R. ing. Further, as shown in FIGS. 3 and 4, the cooling device 10 forms a discharge opening 10e in which the upper surface of the radiator 10a for the engine 7 is provided at substantially the same height as the upper surface of the upper cover 9u in a side view. Cooler 10b and fan 10c for cooling hydraulic oil
Are sequentially provided.

The cooling device 10 may not be provided with the bracket BT, and the cooling device 10 may be directly mounted on the stringer 4, and as shown in FIG.
(BT).

The fan 10c includes a motor 10 such as a hydraulic motor or an electric motor, which is a fan driving unit 10M.
In this embodiment, a hydraulic motor 10d is provided below the fan 10c, and these are provided inside the partition wall 13 communicating with the cooling device 10 as shown in FIG. It is provided in. Also, the partition wall 1
At least one of the air inlets 13a and 13b is opened below and in front of 3 and in the case of the present embodiment, as shown in FIG. 4, the air inlets 13a and 13b are provided. A hydraulic valve 12 is provided in front.

Each of the fan driving means 10M
May be driven by the engine 7. Also, 15
Is a driver's seat having various operating devices. In the present embodiment, a cabin type is installed on the left side of the left vertical girder 4L on the machine base 3, and the electrical equipment devices 16, A fuel tank 17, a hydraulic tank 18 and the like are sequentially arranged.

As shown in FIG. 6 as an application example, the cooling device 10 has, for example, design specifications and required cooling device 1.
The cooling device 10 may be disposed so as to protrude to the left from the left vertical girder 4L and straddle the upper side of the vertical girder 4 depending on the size of 0, etc. In this case, the cooling device 10 is supported by the left vertical girder 4L and the right vertical girder 4R. And reinforcing ribs may be provided as needed.

In this case, as shown in FIG. 6, the lower and front intake ports 13a and 13b may be expanded as shown by a two-dot chain line in FIG.

A hydraulic device 8a such as an engine 7 and a hydraulic pump 8 is provided on one side of the right vertical girder 4R in the front-rear direction so that a cover 9 covering them is as low as possible behind the driver's seat 15. It is installed in. And the cover 9
Although not shown, for example, it may be pivotally supported so as to be able to open and close vertically in several places of the partition E1 of the engine room ER, for example.
Further, only the side cover 9s of the cover 9 may be pivotally supported so as to be openable and closable left and right or up and down. In short, the maintenance of the engine 7, the hydraulic device 8a, the electrical equipment 16 and the like is facilitated. Anything that can be opened and closed may be used.

Since the embodiment of the present invention is configured as described above, when the engine 7 is started and the aircraft is operated,
The air blown by the air blower 9c flows in one direction along the inner wall of the cover 9, and sweeps out the hot air staying around the engine 7 and the hydraulic pump 8, so that it can be cooled effectively.

Also, as shown in FIG. 3 and FIG.
By driving the fan 10c for 0, the cooling air flows into the lower intake port 1
Cool air is smoothly sucked from 3a to the front intake port as indicated by an arrow Y2, and from 13b as indicated by an arrow Y1, so that the cooler 10b and the radiator 10a for hydraulic oil are sequentially and accurately cooled, and then discharged from the discharge opening 10e. Is done. Therefore, it is possible to accurately prevent the exhaust air having the hot air from flowing into the interior of the cover 9 of the engine to impair the cooling efficiency, and the rotation of the fan 10 c is not restricted by the rotation of the engine 7. The operation is well performed by the hydraulic motor 10d so as to maintain the heat balance adapted to the various work rotations of the above, and the noise of the engine 7 is suppressed because the rotation of the engine 7 is not unnecessarily increased for cooling the engine 7. It is possible to perform comfortable work such as excavation in a state where the work is performed.

Then, the operator is provided with a hydraulic device 8a such as an engine 7 and a hydraulic pump 8 on one side of the right vertical girder 4R arranged in parallel at an interval in the front-rear direction, so that a cover 9 covering them is provided. Is installed as low as possible behind the driver's seat 15, the rear view is improved, and it becomes easy to perform the work accurately and safely. Further, since the cooling device 10 and the fan 10c are supported above the stringer 4 as described above, the cooling device 10 and the fan 10c are securely supported, and vibration and noise can be effectively prevented.

The maintenance work of the engine 7, the hydraulic device 8a and the like is performed by the above-described configuration in that the equipment can be installed at a lower part of the machine base 3, and these are provided by a series of covers on one side of the machine body. 9 is opened and closed in the vertical and horizontal directions as described above, so that there is no problem even if there is the counterweight 6 erected at the rear of the aircraft, and the counterweight 6 is placed on the top of the aircraft from the side of the aircraft. Work such as maintenance and inspection can be performed very easily without going up.

In the embodiment shown in FIG. 1, the air guide tube 9 provided in front of the partition E2 in front of the engine room ER.
b, a cooling fan 10F and its fan driving means 10M are provided as shown in FIG. 5 instead of the blower (cooling fan) 9c, and the engine 7, the hydraulic pump 8, and the engine room ER are opened through the opening P provided in the partition E2. The cooling air to be cooled is taken in, and at least one of the outlets 47a at the side of the engine room ER behind the engine 7 and the outlet 47b at the top of the cover 9 of the engine 7 is provided.
Even if it is discharged from the outlet, substantially the same operation and effect as the above embodiment can be obtained. In addition, since the maintenance work can be performed by opening and closing the series of covers in one side of the body in the vertical or horizontal direction, there is no problem even if the counter weight is provided upright at the rear of the body. Work such as maintenance and inspection becomes easy without coming.

Further, since the maintenance work of the engine, the hydraulic device and the like can be performed at a lower position of the airframe, and the maintenance work is performed intensively from one side of the airframe, it can be performed very easily. There are advantages. The cooling air for cooling the inside of the engine room ER described in the above-mentioned embodiment and the application example is taken in by the blower (cooling fan) 9c as shown in FIG. 1 or the cooling fan 10F shown in FIG. However, the present invention is not limited to the above-described embodiment, and if the ejector EJ is applied to the engine room ER in addition to the above as in a modified example described with reference to FIG. In the example, the cooling effect can be further improved, and the blower 9c, the air guide tube 9b, the outlets 47a, 47b shown in FIG. 1 and the cooling fan 10F, the opening P, the outlets 47a, 47b shown in FIG.
And the so-called enclosure-type engine room ER
It can also be.

That is, when the engine room ER is disposed in a substantially hermetically sealed state, the above-described ejector EJ can cool the engine room ER, the engine 7, the hydraulic pump 8, and the like, and can also cool the engine 7, the hydraulic pump 8, and the like. The leakage of the noise generated by the operation of the device to the outside can be prevented by the above-mentioned enclosure, and in the above case, since there is no cooling fan, the working machine can have low noise.

Next, the above-described ejector EJ will be described. As shown in FIG. 7, in the exhaust system of the engine 7, a muffler M is disposed in an exhaust pipe 7c of the engine 7, and an upper partition of an engine room ER in which an outlet of the muffler M is disposed. If an ejector EJ composed of an outer pipe and an inner pipe for sucking heated air in the engine room ER using the exhaust pressure of the engine discharged to the outside and discharging the heated air to the outside is provided in a part of the We, the engine room ER, The engine 7 and the hydraulic pump 8 can be effectively cooled, and the cooling efficiency can be improved.

The ejector EJ is a muffler exhaust outlet pipe M1 as an inner pipe protruding from the muffler M.
And the engine room ER around the discharge outlet pipe M1.
A tail pipe M2 as an outer pipe protruding from the upper partition wall We longer than the exhaust outlet pipe M1, and the exhaust outlet pipe M
1 and a tailpipe M2, and is constituted by an air supply gap M3 that sucks air in the engine room ER.

Also, a number of slit-shaped intake ports R1 are provided in the bottom partition wall Wd of the engine room ER located on the opposite side of the ejector EJ via the air passage EY in the engine room. The intake ports R1 each include a looper R as a noise suppression unit NS that suppresses leakage of engine noise to the outside of the engine room ER, and these loopers R are formed by being cut and raised from the respective air ports R1. ing.

Further, although not shown, the noise suppressing means NS has a sound absorbing effect at the intake port R1 formed in, for example, a box shape, and suppresses engine noise and intake noise leaking from the intake port R1 to the outside of the engine room ER. You may make it suppress.

[0034]

As described above in detail, according to the cooling mechanism for an engine or the like in the traveling working machine according to the first aspect of the present invention, a plurality of longitudinal beams are provided at the center of the machine having the traveling device in the front-rear direction. In the traveling work machine protruding from, the engine and a hydraulic pump and the like are provided on the machine base in the front-rear direction along one side of the stringer, and a driver's seat is installed on the other side of the stringer. A cooling device including a cooling radiator for the engine, a cooler for cooling working oil, and the like is provided substantially above at least one of the stringers of the plurality of stringers, so that the engine, the hydraulic pump, and the like are provided. The hydraulic device can be installed in the longitudinal direction on one side of the fuselage of the stringer facing the driver's seat, and the radiator and the hydraulic oil cooler can be accurately cooled at a position separate from the engine, so that the cooling efficiency is improved. Do not improve Can perform the work in comfort while suppressing the Luo noise, the cooling device can be firmly supported by the girder.

Further, the engine, the hydraulic device and the like can be installed at a lower part of the machine base, and the radiator and the hydraulic oil cooler can be accurately cooled separately from the engine to improve the cooling efficiency. It is possible to suppress noise while doing so.

Further, since the cover for covering the engine and the like is installed as low as possible behind the driver's seat and the rear view is improved, the operator sitting on the driver's seat can control the operation of the aircraft very comfortably. You can work comfortably, safely and efficiently. According to the cooling mechanism for an engine or the like of the traveling work machine according to the second aspect of the present invention, in the configuration according to the first aspect, the cooling device is arranged to substantially straddle at least one of the plurality of the vertical beams. Is provided, in addition to the effect of claim 1, the cooling device can be disposed so as to straddle the stringer, and the degree of freedom in design can be secured.

Further, since the cooling device and the cooling fan are supported on the upper side of the longitudinal girder as described above, the cooling device and the cooling fan can be reliably supported and vibration and noise can be effectively prevented. According to a cooling mechanism for an engine or the like in the traveling work machine according to the third aspect of the present invention, in the configuration according to the first or second aspect, the cooling fan for cooling the engine and a driving unit for driving the cooling fan are provided. With this arrangement, the engine can be smoothly and efficiently cooled without being affected by the cooling device.

According to a cooling mechanism for an engine or the like in the traveling work machine according to the fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the engine room of the engine is heated in the engine room. Since the ejector that discharges the discharged air to the outside is disposed, the heated cooling air in the engine room is efficiently discharged,
The engine room can be ventilated to cool the engine.

According to the cooling mechanism for the engine or the like in the traveling work machine according to the fifth aspect of the present invention, in the configuration according to the fourth aspect, the noise suppression means for the intake air is disposed at the intake port of the engine room. The noise of the intake air from the inner intake port into the engine room can be reduced by the noise suppression means, and the ventilation of the heated air by the ejector can be improved.

According to the cooling mechanism for an engine or the like in the traveling work machine of the present invention described in claim 6, in the structure according to any one of claims 1 to 5, the engine room has at least a substantially dense structure around the engine. Since it is constituted by the enclosure surrounding the shape, leakage of noise due to the operation of the engine to the outside is reduced, and the cooling efficiency of the engine and the engine room can be improved.

[Brief description of the drawings]

FIG. 1 is a view illustrating an embodiment of the present invention and is a plan view of a machine base configuration of a hydraulic shovel.

FIG. 2 is an arrow view showing a cross section taken along line 2A-2A in FIG. 1;

FIG. 3 is an arrow view showing a section taken along line 3A-3A in FIG. 1;

FIG. 4 is an arrow view showing a section taken along line 4A-4A in FIG. 1;

FIG. 5 is a schematic explanatory view showing a state in which a right side surface of FIG. 1 is partially broken.

FIG. 6 is an application example of the embodiment of the present invention and is an explanatory diagram showing a state similar to FIG. 3;

FIG. 7 is a modified example of the embodiment of the present invention, and is an explanatory diagram showing a state similar to FIG. 5;

FIG. 8 is a left side view showing a hydraulic shovel to which a cooling mechanism such as an engine is applied in the traveling work machine of the present invention.

FIG. 9 is an explanatory view showing a plane of a machine base configuration of a conventional hydraulic shovel.

FIG. 10 is an arrow view showing a cross section along the line 10A-10A in FIG. 9;

FIG. 11 is a left side view showing a partially broken state of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling work machine (hydraulic shovel) 2 Traveling device 3 Machine stand 4 Vertical girder 4L Left vertical girder 4R Right vertical girder 5 Front working part 6 Counter weight 7 Engine 7a Connecting tool 7b Intake pipe 7c Exhaust pipe 8 Hydraulic pump 9 Cover 9a Engine Hood 9b Air guide tube 9c Blower (cooling fan) 10 Cooling device 10a Radiator 10b Cooler 10c Fan 10d Motor 10e Discharge opening 10M Fan drive means 12 Hydraulic valve 13 Partition wall 13a Inlet 13b Inlet 15 Operator seat 16 Electric device 17 Fuel Tank 18 Hydraulic tank

Claims (6)

[Claims] 1. A traveling work machine having a plurality of longitudinal beams projecting in the front-rear direction at a central portion of a machine frame having a traveling device, wherein an engine, a hydraulic pump, and the like are provided on one side of the longitudinal beam on the machine frame. A driver's seat is provided on the other side of the stringer, and a radiator for cooling the engine and hydraulic oil cooling are provided substantially above at least one of the stringers. A cooling mechanism for an engine or the like in a traveling work machine, wherein a cooling device including a cooler or the like is provided. 2. The cooling mechanism for an engine or the like in a traveling work machine according to claim 1, wherein the cooling device is provided so as to substantially straddle at least one of the stringers. 3. A cooling fan for cooling the engine,
3. A cooling mechanism for an engine or the like in a traveling work machine according to claim 1, further comprising a driving unit for driving the cooling fan. 4. The traveling work machine according to claim 1, wherein an ejector for discharging air heated in the engine room to the outside is disposed in an engine room of the engine. Cooling mechanism for engines, etc. 5. The cooling mechanism for an engine or the like in a traveling work machine according to claim 4, wherein intake noise suppression means is provided at an intake port of the engine room. 6. An engine or the like in a traveling work machine according to claim 1, wherein said engine room is constituted by an enclosure which surrounds at least substantially the periphery of said engine. Cooling mechanism.