KR20070088251A - Cooling apparatus for construction machine - Google Patents

Abstract

A cooling device for a working machine having a sound-insulating/flow-straightening plate, the cooling device being capable of meeting different working machine models and working conditions. An upper cover (3a) is placed above a cooling package (21) having a heart exchanger (11) and a cooling fan (12), and a side door (3b) is provided at one side of the upper cover (3a) so as to face the cooling package (21). The upper cover (3a) has an upper air inlet hole (6) between the side door (3b) and the cooling package (21), and a side air inlet hole (7) is opened in an upper section neighboring on the upper cover, at a side door (3b). A sound-insulating/flow-straightening plate (27) is pivotally installed by a hinge (26) disposed between the upper air inlet hole (6) and the side air inlet hole (7). The angle of inclination of the sound-insulating/flow-straightening plate (27) is automatically determined by balance between pressures of airflows sucked by the upper air inlet hole (6) and the side air inlet hole (7). The sound-insulating/flow-straightening plate (27) shields internally produced sound and straighten the air sucked from the upper air inlet hole (6) and the side air inlet hole (7).

Description

Cooling Apparatus for Construction Machines {Cooling Apparatus for Construction Machine}

The present invention relates to a cooling device for a working machine having a cooling package with a heat exchanger and a cooling fan of at least a radiator for cooling the engine.

As shown in FIG. 18, in the hydraulic excavator as a working machine, the upper swinging body 2 is pivotably provided on the lower traveling body 1 via a pivot bearing, and the upper swinging body 2 includes a cover 3. The power unit covered with) is mounted, and also the cap 4 and the front work device 5 are mounted.

The upper intake hole 6 is opened in the upper cover 3a fixed to one of the covers 3, and the side intake hole is formed in the upper part of the side door 3b attached to the upper cover 3a. 7) is opening.

As shown in FIG. 19, a power package in the cover 3 includes a cooling package in which a heat exchanger 11 such as a radiator and an oil cooler and a cooling fan 12 are integrated, an engine 13, a hydraulic pump 14, Power device related devices, such as a muffler 15, are provided.

In order to cool the engine 13, the cooling air (outside air) introduced from the upper intake hole 6 and the side intake hole 7 is cooled by the cooling fan 12 to the heat exchanger 11 of the cooling package. Is passed through the engine 13 and the hydraulic pump 14, and is discharged to the outside from the exhaust hole 16 formed on the muffler 15 side of the cover 3.

Since it consists of the said structure, as shown in FIG. 20, between the upper intake hole 6 of the upper cover 3a, and the side intake hole 7 of the side door 3b, and the engine 13 and its auxiliary apparatus. Since there is no shield, the internally generated noises (engine sounds and fan sounds) indicated by the dotted arrows are emitted directly from the intake holes 6 and 7 to increase the ambient noise.

In addition, the inflow of the cooling air indicated by the solid arrows drawn from the upper intake hole 6 and the side intake hole 7 collides in the region A on the front surface of the heat exchanger 11 of the cooling package, causing turbulence to occur. There exists a possibility that the suction efficiency of cooling air may fall.

Therefore, the upper and lower intake holes for injecting cooling air into the engine cover are respectively provided on the upper and lower surfaces of the engine cover without providing the intake holes on the side, and the cooling air introduced from the upper and lower intake holes is replaced with a heat exchanger ( There is a cooling device having a configuration in which upper and lower cooling air ducts are respectively drawn to the front surface of 11) (see Patent Document 1, for example).

Since the structure described in this patent document 1 does not provide an intake hole on the side, the suction efficiency of the air flow by a cooling fan is inferior, and therefore, it is necessary to provide an up and down cooling air duct communicating with the up and down intake holes. In addition, it is necessary to give rectification functions to each of the upper and lower cooling air ducts so that the cooling air introduced from them does not mix with each other, and the structure is complicated. In addition, since the lower intake hole is opened above the endless track of the lower traveling body, there is a fear that the soil, dust, and debris transferred to the upper end of the endless track may be sucked.

On the other hand, as shown in FIG. 21, on the front surface of the heat exchanger 11 of a cooling package, the sound isolation | separation rectification plate 17 of 45 degrees or more with respect to a horizontal surface is fixedly fixed, and the upper air intake of the upper cover 3a is carried out. As the entire surface of the heat exchanger 11 cannot be viewed directly from each opening of the side intake hole 7 of the hole 6 and the side door 3b, the ambient noise rise due to leakage of the engine sound and the cooling fan sound. At the same time, the cooling air flowing from each of the upper intake hole 6 and the side intake hole 7 collides with the front surface of the heat exchanger 11 to become turbulent, thereby preventing the possibility of lowering the suction efficiency of the cooling air. A proposal has been made to make this happen.

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-16094 (page 4-5, Figure 2)

[Initiation of invention]

[Problem to Solve Invention]

In FIG. 21, intake air 18 collected from the upper intake hole 6 of the upper cover 3a and intake air 19 taken from the side intake hole 7 of the side door 3b. Since the ratio of each suction amount, suction speed, suction angle, etc. are significantly different depending on the type, performance, operating conditions, etc. of the type of hydraulic excavator, the angle of attachment of the sound insulation rectifying plate 17 Is varied in many ways.

That is, the attachment angle of the optimum sound-blocking rectifying plate 17 according to the gas shape and performance of each model varies in various ways, and even in the same gas, the intake suction amount, the suction angle, etc. are different depending on the operating conditions. Therefore, the conventional fixed sound blocking rectification plate 17 cannot be used.

When the angle of attachment of the fixed sound-blocking rectifying plate 17 is not suitable, the sound-blocking rectifying plate 17 becomes the suction resistance of the cooling air, and the intake side pressure loss increases, and the intake efficiency deteriorates. do. On the other hand, the calculation of the attachment angle of the suitable sound blocking rectification plate 17 also has the problem that a huge analysis time takes place.

Moreover, in the conventional fixed sound insulation rectification plate 17, when the maintenance is performed, when cleaning the heat exchanger 11 of a cooling package from the side door side, it will be difficult to clean if the sound insulation rectification plate 17 is in front. Or, there is a problem that a portion that is impossible to clean occurs.

Similarly, when cleaning the heat exchanger 11, it is necessary to remove the screen located in front of the heat exchanger 11, and removing the screen is also a gap between the sound blocking rectifying plate 17 and the heat exchanger 11. It is difficult because it must be made in the form of, and there is a fear of damaging the heat exchanger (11). In addition, since the gap with the heat exchanger 11 is small, it is difficult to put a nozzle to be used for cleaning, which may damage the heat exchanger 11.

Moreover, in order to improve the cleaning property of the heat exchanger 11 of a cooling package, although this heat exchanger 11 was made into the structure which can swing out, there is a sound cut-off rectification plate 17, and the swing of the heat exchanger 11 is carried out. There is a possibility that the out may be impossible and the heat exchanger 11 may not be cleaned.

The present invention has been made in view of the above, and an object of the present invention is to provide a cooling device for a work machine having a sound-blocking rectifying plate capable of responding to a difference in the type and operating conditions of the work machine. It is an object of the present invention to provide a cooling device for a work machine having a sound-blocking rectifying plate that can also cope with.

[Means for solving the problem]

The invention as set forth in claim 1 further comprises: a cooling package having a heat exchanger and a cooling fan, an upper cover provided above the cooling package, a side cover provided on one side of the upper cover opposite the cooling package, and a side cover on the upper cover. And the upper intake hole opened between the cooling and cooling package, the side intake hole opened in the upper side adjacent to the upper cover in the side cover, and the upper intake hole and the side intake hole are movable. It is a cooling device of a working machine having a sound blocking rectifying plate which blocks at the same time and rectifies the intake air sucked from the upper intake hole and the side intake hole, and thus, the air flow sucked from the upper intake hole of the upper cover and the side of the side cover. Sound isolation is rectified by the balance of the wind pressure acting on the sound blocking rectification plate from the air flow sucked from the intake hole. Since the rate is automatically determined in the state most suitable for rectifying each air flow, that is, the air sucked from each intake hole becomes equal to the wind pressure acting on the sound blocking rectification plate, so this sound blocking With the rectifying plate, the suction flow of cooling air is not impeded and the pressure loss does not increase, and it is possible to perform smooth and efficient intake, and at this time, by the sound blocking rectifying plate, from the upper intake hole of the upper cover. By preventing direct air from colliding with the intake air of the intake air from the side intake hole of the side cover and becoming turbulent, the rectifying effect can be obtained. Wind pressure acting from the air flow sucked from the upper intake hole The sound blocking rectification plate, which is located in balance with the force and the wind pressure acting on the air flow sucked from the side intake hole, blocks the internal noise from leaking out from the front of the cooling package, Reduction can be aimed at.

In the invention according to claim 2, in the cooling apparatus of the working machine according to claim 1, the rotating shaft portion disposed between the upper intake hole and the side intake hole is provided, and the sound-blocking rectifying plate is rotated by the rotating shaft part. It is freely supported by the shaft, and therefore, the sound-blocked rectifying plate is freely pivotally supported by the rotating shaft portion, so that the attachment structure of the sound-blocked rectifying plate can be simplified.

In the invention according to claim 3, in the cooling device for a work machine according to claim 1 or 2, the hinge of which the base of the sound-blocking rectifying plate is attached to the lower surface of the upper cover and the tip of the sound-blocking rectifying plate are disposed on the lower surface of the upper cover. It is provided with a locking means for fixing in a folded state, and thus, the sound-blocking rectifying plate is folded to the lower surface of the upper cover that does not face the front of the cooling package with the hinge as a support point, the locking means When fixed by, it is possible to facilitate maintenance work such as cleaning of the cooling package without being disturbed by the sound blocking rectifying plate.

In the invention according to claim 4, a plurality of sound-blocking rectifying plates in the cooling system of the work machine system according to any one of claims 1 to 3 are provided, and the rectifying effect is improved by the plurality of sound-blocking rectifying plates. It is possible.

The invention according to claim 5 is a side door in which the side cover in the cooling device of the work machine according to claim 1 or 2 is freely opened and closed outwardly, and the sound blocking rectifying plate is attached to this side door, Therefore, by opening the side door of the outer opening, the sound blocking rectification plate installed on the side door is separated from the cooling package, so that it is possible to facilitate maintenance work of the cooling package without being disturbed by the sound blocking rectifying plate. Do.

The invention according to claim 6 is a cooling device for a work machine according to any one of claims 1 to 5, comprising: an actuator for operating a sound blocking rectifying plate, a temperature sensor for detecting temperature information of a cooling package, and a temperature sensor. And controlling means for controlling the actuator based on the temperature information to control the angle of the sound blocking rectifying plate, and based on the temperature of the cooling package detected by the temperature sensor, the control means controls the sound blocking by the actuator. By operating the rectifying plate and adjusting the intake flow rate or intake path sucked from the upper intake hole of the upper cover or the side intake hole of the side cover, it becomes possible to cope with a change in the operating conditions of the working machine.

In the invention according to claim 7, the cooling package in the cooling device of the work machine according to any one of claims 1 to 6 is a heat exchanger of a radiator for cooling the cooling water of the engine and an oil cooler for cooling the hydraulic oil of the hydraulic circuit. Among the heat exchanger of the roof tile, the condenser of the air conditioning circuit, and the aftercooler for cooling the engine intake compressed by the turbocharger, a plurality are selected and combined, and the sound-blocking rectifying plate operates according to the combination structure of these and the cooling fan. Therefore, due to the combination structure of the heat exchanger of the radiator, the heat exchanger of the oil cooler, the condenser of the air conditioning circuit and the heat exchanger of the after cooler, and the cooling fan, even if the overall temperature distribution of the cooling package changes, By moving-adjusting the plate, it is possible to appropriately distribute the intake air amount corresponding to the temperature distribution.

[Effects of the Invention]

According to the invention as set forth in claim 1, the sound blocking is rectified by balancing the air flow sucked from the upper intake hole of the upper cover and the air pressure acting on the sound blocking rectification plate from the air flow sucked from the side intake hole of the side cover. Since the plate is automatically determined in the state most suitable for rectifying each air flow, that is, it is possible to equalize the wind pressure acting on the sound-blocking rectifying plate by the air sucked from each intake hole, so that this sound-blocking rectification By the plate, the suction flow of cooling air is not inhibited and pressure loss does not increase, and smooth and efficient intake can be performed, and at this time, by the sound-blocking rectifying plate, suction from the upper intake hole of the upper cover is performed. Air and intake air from the side intake hole of the side cover collide directly and become turbulent By preventing it, a rectifying effect can be obtained, and the sound-blocking rectifying plate can automatically cope with the difference in the type and operating conditions of the working machine, and also the wind pressure acting from the air flow sucked from the upper intake hole, and the side intake hole. Due to the wind pressure acting from the air flow sucked from the air, the balanced sound-blocking rectifying plate blocks internally generated noises leaking from the front of the cooling package, thereby reducing noise leaking to the surroundings. have.

According to the invention of claim 2, since the sound-blocking rectifying plate is pivotally supported freely by the rotating shaft portion, the attachment structure of the sound-blocking rectifying plate can be simplified.

According to the invention as set forth in claim 3, when the sound-blocking rectifying plate is folded with the hinge at the lower surface of the upper cover which does not face the front surface of the cooling package with the support point, the sound-blocking rectifying plate is fixed by the locking means. Maintenance work such as cleaning of the cooling package can be facilitated without disturbing the rectifying plate.

According to the invention described in claim 4, the rectifying effect can be improved by the plurality of sound blocking rectifying plates.

According to the invention of claim 5, since the sound-blocking rectifying plate provided on the side door is separated from the cooling package by opening the side door of the outer opening, the maintenance work of the cooling package is not interrupted by the sound-blocking rectifying plate. Can be facilitated.

According to the invention according to claim 6, the control means operates the sound blocking rectification plate by the actuator based on the temperature of the cooling package detected by the temperature sensor, and the upper intake hole of the upper cover or the side intake hole of the side cover. By adjusting the intake air flow rate or the intake path sucked in from the above, it is possible to cope with a change in the operating conditions of the work machine.

According to the invention of claim 7, even if the overall temperature distribution of the cooling package is changed by the combination structure of the heat exchanger of the radiator, the heat exchanger of the oil cooler, the condenser of the air conditioning circuit and the heat exchanger of the after cooler, and the cooling fan, By operating the blocking rectification plate, the intake air amount can be appropriately distributed corresponding to the temperature distribution.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows 1st Embodiment of the cooling apparatus of the working machine which concerns on this invention.

2 is a perspective view of a power unit according to the same first embodiment as described above.

3 is a perspective view of the side cover according to the same first embodiment as described above.

Fig.4 (a) is a perspective view of the side cover which concerns on 2nd Embodiment of the same cooling device as above, (b) is the perspective view which expanded the principal part.

Fig.5 (a) is a perspective view which shows the state which piled up the sound blocking rectification plate which concerns on 2nd Embodiment of the same cooling apparatus as above, (b) is the perspective view which expanded the principal part.

6 is a cross-sectional view showing the third embodiment of the same cooling device as described above.

7 is a cross-sectional view showing the fourth embodiment of the same cooling device as described above.

8 is a cross-sectional view showing the fifth embodiment of the same cooling apparatus as described above.

9 is a cross-sectional view showing the sixth embodiment of the same cooling device as described above.

10 is a cross-sectional view showing the seventh embodiment of the same cooling device as described above.

11 is a flowchart showing a control procedure in the same seventh embodiment as described above.

Fig. 12 is a perspective view showing a first embodiment of a cooling package in the same cooling device as above.

Fig. 13 is a perspective view showing a second embodiment of the same cooling package as above.

Fig. 14 is a perspective view showing a third embodiment of the same cooling package as above.

Fig. 15 is a perspective view showing a fourth embodiment of the same cooling package as above.

Fig. 16 is a perspective view showing a fifth embodiment of the same cooling package as above.

Fig. 17 is a perspective view showing a sixth embodiment of the same cooling package as above.

18 is a perspective view showing a hydraulic excavator as a work machine.

19 is a cross-sectional view of the power unit of the hydraulic excavator as described above.

20 is a cross-sectional view showing a conventional example of the intake portion structure of the cooling package of the same power unit as described above.

21 is a cross-sectional view showing an improvement example of the same intake portion structure as described above.

[Description of the code]

3a: top cover

3b: side door as side cover

6: upper intake hole

7: side intake hole

11: heat exchanger

11ra: radiator heat exchanger

11oi: Heat Exchanger of Oil Cooler

l1co: condenser in air conditioning circuit

11af: Aftercooler Heat Exchanger

12: cooling fan

21: cooling package

26: hinge as a rotating shaft

27: sound blocking rectification plate

31: locking means

41: Actuator

42, 43: temperature sensor

44: control panel as a control means

Best Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Below, this invention is demonstrated referring various embodiment shown in FIGS. In addition, since the hydraulic excavator as a working machine shown in FIG. 18 is also referred to description of this invention, the same code | symbol is attached | subjected to the part corresponding to each part of FIG.

Based on FIG. 1 thru | or 3, 1st Embodiment of the cooling apparatus of a hydraulic excavator is demonstrated.

As shown in FIG. 1, in the cooling device chamber 20 of the hydraulic excavator, a cooling package 21 including a heat exchanger 11 such as a radiator for cooling the engine and a cooling fan 12 is provided. 13) together with the cover (3). The cover 3 includes an upper cover 3a provided above the cooling package 21 and a side door 3b serving as a side cover provided on one side of the upper cover 3a opposite to the cooling package 21. Equipped.

As shown in FIG. 2, with respect to the fixed upper cover 3a, the side door 3b is the several hinge 23 arrange | positioned in the up-down direction to the support member 22 provided in the back side of the cap 4 It is attached by), and it is installed freely by opening and closing. In the vicinity of the cooling package 21, an engine intake filter 24 is disposed. In this FIG. 2, 25 is a counter weight.

As for the cooling package 21, the heat exchanger 11oi of the oil cooler which cools the hydraulic fluid of a hydraulic circuit is comparatively below the heat exchanger 11ra of the radiator which cools the cooling water of the engine 13 in front of FIG. A condenser 11co of an air conditioning circuit is arranged in front of FIG. 2 with respect to the heat exchanger 11oi of this oil cooler, and is also located in front of FIG. 2 relatively upward with respect to the heat exchanger 11ra of a radiator. The heat exchanger 11af of the after cooler which cools the engine intake compressed by the turbocharger is arrange | positioned, and the cooling fan 12 is arrange | positioned at the engine 13 side of the heat exchanger 11ra of a radiator.

1 to 3, a plurality of upper intake holes 6 are opened in the upper cover 3a between the side door 3b and the cooling package 21, while the side door 3b is opened. ), A plurality of side intake holes 7 are opened in a portion adjacent to the upper cover 3a.

On the lower surface of the upper cover 3a, the base end of the sound-blocking rectifying plate 27 is formed by a pair of hinges 26 serving as rotation shafts disposed between the upper intake holes 6 and the side intake holes 7. It is supported freely by rotation.

The sound blocking rectifying plate 27 includes a wind pressure of intake air from the upper intake hole 6 which is an opening above the body, and a wind pressure of intake air from the side intake hole 7 which is an opening of the side door 3b. The inclination angle of the upper intake hole 6 and the side intake hole 7 to sound the internally generated sound (engine sound, fan sound) leaking outward from the upper intake hole 6 and the side intake hole 6, And rectifying the intake air sucked in from the side intake holes 7.

In FIG. 3, the handle 28 for door opening / closing operation, and the door closing fixing parts 29, such as a magnet and the lock part, are provided on the opposite side to the hinge 23 of the side door 3b, respectively.

In addition, in FIG. 1, the air sucked in from the intake hole 30a provided in the side surface of the cover 3 is also sucked in the cooling package 21. As shown in FIG.

Next, the effects of the first embodiment shown in FIGS. 1 to 3 will be described.

The sound insulated rectifying plate 27 is movably provided around the hinge 26 disposed between the upper intake hole 6 and the side intake hole 7, so that the upper intake hole of the upper cover 3a ( The sound blocking is rectified by the balance of the air flow sucked from 6) and the air pressure acting on the sound blocking block rectifying plate 27 from the air flow sucked from the side intake hole 7 of the side door 3b. The angle of the plate 27 is automatically set to the inclination which is most suitable for rectifying each air stream.

That is, since the air sucked in from each of the intake holes 6 and 7 can equalize the wind pressure acting on the sound blocking rectification plate 27, the sound blocking rectifying plate 27 makes The suction flow is not inhibited and the pressure loss does not increase, and smooth and efficient intake can be performed.

At this time, the intake air from the upper intake hole 6 of the upper cover 3a and the intake air from the side intake hole 7 of the side door 3b are directly caused by the sound blocking rectifying plate 27. By preventing collision and turbulence, the rectifying effect can be obtained, and the sound-blocking rectifying plate 27 can automatically cope with differences in the type and operating conditions of the hydraulic excavator.

In addition, the wind pressure acting from the air flow sucked from the upper intake hole 6 and the wind pressure acting from the air flow sucked from the side intake hole 7 are inclined to the sound blocking rectifying plate 27 which is inclined in a balanced manner. As a result, the engine sound and the fan sound leaking from the front surface of the heat exchanger 11 of the cooling package 21 are blocked, so that the noise leaking to the surroundings can be reduced.

4 and 5 show a second embodiment. In addition, the same code | symbol is attached | subjected to the same part as FIG. 3, and the description is abbreviate | omitted.

4 and 5, the base end of the sound blocking rectification plate 27 is rotatably attached to the lower surface of the upper cover 3a by a pair of hinges 26, and the sound blocking block The tip of the rectifying plate 27 is fixed by the locking means 31 in a folded state on the lower surface of the upper cover 3a.

This locking means 31 is shown in FIG. 4 (b) by the attachment clasp 32 shown in FIG. 5 (b) at the tip center portion on the opposite side to the hinge 26 of the sound-blocking rectifying plate 27. As described above, the slide pin 33 protruding from the tip of the sound-blocking rectifying plate 27 is installed freely forward and backward, while the protruding slide pin 33 is engaged with the pin as shown in Fig. 5 (b). As shown in Fig. 4B, the fitting portion 34 is provided on the lower surface on the opposite side with the upper intake hole 6 of the upper cover 3a interposed therebetween. The operation part 35 which slides this pin is protruded by the slide pin 33. As shown in FIG.

As the locking means for fixing the sound blocking rectifying plate 27 to the upper cover 3a, a fixing means by bolt up, a strong magnet, or the like may be used.

As described above, the sound blocking rectifying plate 27 is axially supported so as to be movable by the hinge 26, and at the same time, the structure can be fixed to the locking means 31 on the lower surface of the upper cover 3a. When cleaning the heat exchanger 11, such as a radiator of the package 21, as shown in FIG. 5, the sound isolation | separation rectification plate 27 is fixed upwards, and the sound insulation block rectification plate in front of the heat exchanger 11 which cleans. The cooling package 21 is cleaned after the 27 is not positioned. For example, a screen (not shown) located in front of the heat exchanger 11 is removed, a cleaning nozzle is inserted, or the heat exchanger 11 is swinged out.

That is, as shown in FIGS. 4 to 5, the sound blocking rectifying plate 27 is folded and folded on the lower surface of the upper cover 3a not facing the front surface of the cooling package 21 about the hinge 26. When the slide pin 33 protrudes from the tip of the sound blocking rectification plate 27 and engages with the pin engaging portion 34, the sound blocking rectifying plate 27 is fixed to the lower surface of the upper cover 3a. It is possible to facilitate the maintenance work of the cooling package 21, for example, cleaning the entire surface of the heat exchanger 11 such as a radiator, without being disturbed by the sound blocking rectifying plate 27.

In addition, it becomes easy to remove the screen on the front surface of the heat exchanger 11 at the time of cleaning. Moreover, since the cleaning nozzle used for cleaning does not need to be inserted in the narrow gap while avoiding the sound blocking rectifying plate 27 in the downward position, the risk of damaging the heat exchanger 11 is also reduced.

In addition, in the cooling package 21 which has the structure which can swing out the heat exchanger 11 in order to improve the cleaning property of the heat exchanger 11, since the sound insulation block rectification plate 27 becomes a folding type, the swing of the heat exchanger 11 is performed. It is possible to out, and the cleaning property of the heat exchanger 11 can be improved.

In addition, when starting the engine 13 in a state where the atmospheric temperature is low, the cooling cut-off rectifying plate 27 is closed as shown in FIG. 5, and the air flow sucked in from the upper intake hole 6 is blocked, thereby cooling the package. The cooling capacity of (21) is limited to prevent overcooling, and efficient turbulence operation is performed.

Next, FIG. 6 shows 3rd Embodiment. In addition, the same code | symbol is attached | subjected to the same part as FIG. 1, and the description is abbreviate | omitted.

As shown in FIG. 6, a plurality of sound blocking rectifying plates 27 for sounding internal generated sound (engine sound, fan sound) and rectifying the intake air sucked from the upper intake hole 6 and the side intake hole 7 are shown. ) Is provided to the hinge 26 as a rotating shaft portion disposed between the upper intake hole 6 and the side intake hole 7, and the plurality of hinges 26a disposed between the plurality of upper intake holes 6. As a result, the bottom surface of the upper cover 3a is freely attached.

The plurality of sound blocking rectifying plates 27 may be rotated freely individually, but as shown in FIG. 6, the plates 27 are connected to each other by an interlocking link 36 or the like, and the parallel intervals are maintained. You may make it rotate.

Then, the plurality of sound blocking rectifying plates 27 are movably provided around the hinges 26 and 26a, whereby air flow sucked from the upper intake holes 6 of the upper cover 3a and the side doors. By the balance of the wind pressure acting on the sound-blocking rectifying plate 27 from the air flow sucked from the side intake hole 7 of (3b), the angle of the sound-blocking rectifying plate 27 is automatically determined and in a balanced manner. A plurality of inclined sound-blocking rectifying plates 27 can reduce engine noise and fan noise leaking from the upper intake hole 6 and the side intake holes 7 to the surroundings, and at the same time, a plurality of sound By the blocking rectification plate 27, the intake air from the upper intake hole 6 of the upper cover 3a and the intake air from the side intake hole 7 of the side door 3b directly collide and become turbulent. A rectifying effect can be obtained. In particular, by the plurality of sound blocking rectifying plates 27, the rectifying effect on the intake air from the upper intake hole 6 can be improved.

Next, FIG. 7 shows 4th embodiment. In addition, the same code | symbol is attached | subjected to the same part as FIG. 1, and the description is abbreviate | omitted.

Although the side door 3b is provided to open and close freely as shown in FIG. 2, the side door 3b is arrange | positioned between the upper intake hole 6 and the side intake hole 7 in this side door 3b. The sound blocking rectification plate 27 which, by the hinge 26 as the rotating shaft portion, isolates the internally generated sound (engine sound, fan sound) and rectifies the intake air sucked from the upper intake hole 6 and the side intake hole 7. It is installed freely by rotation.

In this way, since the sound blocking rectifying plate 27 is installed in the side door 3b of the outer opening, the side door 3b is opened by opening the side door 3b as shown in Fig. 2 during maintenance. The sound blocking rectifying plate 27 attached to the can be away from the cooling package 21. Therefore, maintenance work of the cooling package 21 in the cooling device chamber 20, for example, cleaning of the heat exchanger 11ra of a radiator, etc. are easily performed, without being interrupted by the sound blocking rectification plate 27. can do.

Next, FIG. 8 shows 5th embodiment. In addition, the same code | symbol is attached | subjected to the same part as FIG. 1, and the description is abbreviate | omitted.

As shown in FIG. 8, the cooling package 21 is covered by the upper cover 3a and the side door 3b, the upper intake hole 6 is opened in the upper cover 3a, and the side door 3b The side intake hole 7 is opened in the bottom, and the lower surface of the upper cover 3a is negatively blocked by a hinge 26 as a pivot shaft disposed between the upper intake hole 6 and the side intake hole 7. The rectification plate 27 is provided freely to rotate.

An actuator 41 such as a solenoid that rotates the sound blocking rectifying plate 27 to the hinge 26 as a supporting point is axially supported between the upper cover 3a and the sound blocking rectifying plate 27.

The cooling package 21 is provided with a temperature sensor 42 for detecting temperature information such as engine coolant temperature of the radiator and oil pressure of the hydraulic circuit operation of the oil cooler, and the engine 13 further includes an engine 13 inside the engine 13. The temperature sensor 43 which detects a temperature is provided. In addition, you may install the temperature sensor 42 in the piping through which engine coolant and hydraulic fluid flow.

These temperature sensors 42 and 43 are connected to a control panel 44 as a control means, and the control panel 44 controls the actuator 41 based on the temperature information from the temperature sensors 42 and 43 to obtain sound. The angle of the blocking rectification plate 27 is controlled.

The control panel 44 is connected to an accelerator dial for setting the rotational speed at no load of the engine 13, an engine rotational speed sensor (not shown), or the like so as to obtain rotational speed information of the cooling fan 12 from them. The actuator 41 may be controlled based on the cooling fan rotational speed information to control the angle of the sound blocking rectification plate 27.

Next, the effect of the 5th embodiment shown in this FIG. 8 is demonstrated.

When the engine coolant temperature detected by the temperature sensors 42 and 43, the hydraulic circuit hydraulic oil temperature, the temperature in the engine 13, and the like are low, the control panel 44 is the sound blocking rectification plate 27 by the actuator 41. As shown by the dashed-dotted line in FIG. 8, the side intake hole 7 of the side door 3b is rotated in a direction of closing to cause turbulence in the air flow sucked in a large amount from the side intake hole 7. The resistance is imparted so that the cooling capacity of the cooling package 21 is limited so as not to be overcooled, so that an efficient turbulence operation is performed.

On the other hand, when the engine coolant temperature detected by the temperature sensors 42 and 43, the hydraulic circuit hydraulic oil temperature, the temperature in the engine 13, etc. rise, the control panel 44 stops the above-mentioned turbulence operation, The blocking rectification plate 27 is controlled to the inclined state shown by the solid line in FIG.

At this time, the inclination angle of the sound cut-off rectifying plate 27 is controlled by an actuator 41 such as a solenoid according to a change in operating conditions of the hydraulic excavator, and suctioned from the upper intake hole 6 of the upper cover 3a. The sound blocking block rectifying plate 27 is automatically controlled so that the supplied air flow and the air flow sucked from the side intake hole 7 of the side door 3b are smoothly supplied to the high temperature portion of the cooling package 21.

For example, when the hydraulic circuit operation oil temperature rises significantly due to the heavy load of the hydraulic excavator, in order to increase the cooling efficiency of the oil cooler located below, the sound blocking rectifying plate 27 is raised from the standard inclination angle. Automatically adjusted to the inclination angle, the air flow sucked from the side intake hole 7 is guided to the lower side of the cooling package 21.

In addition, the sound blocking rectifying plate 27 directly inhales the intake air from the upper intake hole 6 of the upper cover 3a and the intake air from the side intake hole 7 of the side door 3b. By preventing this, the rectifying effect can be obtained. Thereby, the suction flow of cooling air is not inhibited and a pressure loss does not increase, and smooth intake can be performed efficiently.

In addition, the upper intake hole 6 and the side intake hole 7 are formed from the front surface of the heat exchanger 11 of the cooling package 21 by the sound blocking rectification plate 27 controlled in the inclined state shown by a solid line in FIG. 8. Engine sound and fan sound leaking out through the outside are cut off, so that the noise leaking around can be reduced.

On the other hand, the sound-blocking rectifying plate 27 may be axially supported so that two sheets can overlap, and such a sound-blocking rectifying plate 27 may be provided so as to be rotated separately by the respective actuators 41. In that case, one of the sound blocking rectification plates 27 blocks the upper intake hole 6 and the other of the sound blocking rectifying plates 27 blocks the side intake holes 7 so as to be more efficient. You can do this good turbulence.

Next, FIG. 9 shows 6th embodiment. In addition, the same code | symbol is attached | subjected to the same part in FIG. 6 and FIG. 8, and the description is abbreviate | omitted.

Actuators 41, such as solenoids, which rotate the plurality of sound blocking rectification plates 27 via interlocking links 36, with the plurality of hinges 26, 26a serving as pivot shafts, and the cooling package 21 and the engine. The temperature sensor 42, 43 for detecting the temperature information of (13) and the actuator 41 based on the temperature information from these temperature sensors 42, 43 to control the plurality of sound blocking rectification plates 27; The control panel 44 as a control means for controlling the angle is provided.

Then, the control panel 44 detects a change in the operating conditions of the hydraulic excavator based on the temperature information from the temperature sensors 42 and 43, and adjusts the inclination angle of the sound blocking rectification plate 27 by the actuator 41. The air flow sucked from the upper intake hole 6 of the upper cover 3a and the air flow sucked from the side intake hole 7 of the side door 3b are smoothly controlled at the high temperature portion of the cooling package 21. A plurality of sound blocking rectifying plates 27 are automatically controlled to be supplied. At that time, the plurality of sound blocking rectifying plates 27 can improve the rectifying effect on the intake air from the upper intake hole 6.

Next, FIG. 10 shows 7th Embodiment. In addition, the same code | symbol is attached | subjected to the same part as FIG. 7 and FIG. 8, and the description is abbreviate | omitted.

In the embodiment shown in FIG. 10, as illustrated in FIG. 2, the sound-blocking rectifying plate 27 is provided via a hinge 26 in the side intake hole 7 of the side door 3b which is freely opened and closed. Rotating is provided freely, and actuator 41, such as a solenoid, is axially supported between this sound cut-off rectification plate 27 and the upper end of the side door 3b.

Further, the temperature sensor 42, 43 for detecting temperature information of the cooling package 21 and the engine 13, and the actuator 41 is controlled based on the temperature information from the temperature sensors 42, 43 to control the plurality of actuators. The control panel 44 as a control means for controlling the angle of the sound blocking rectifying plate 27 is provided.

Then, since the sound-blocking rectifying plate 27 is attached to the side door 3b with the outward opening, the side door 3b is opened by opening the side door 3b as shown in Fig. 2 during maintenance. ), The sound blocking rectifying plate 27 attached to the can be away from the cooling package 21. Therefore, maintenance work of the cooling package 21 in the cooling device chamber 20, for example, cleaning of the heat exchanger 11ra of a radiator, etc. are easily performed, without being interrupted by the sound blocking rectification plate 27. can do.

FIG. 11 shows an example of the control in the embodiment shown in FIG. 10. At the start, the sound blocking rectifying plate 27 provided in the side intake hole 7 of the side door 3b is closed. (Step 1).

When the engine 13 is started (step 2), the control panel 44 determines whether the engine coolant temperature detected by the temperature sensor 42 is higher than the set temperature (step 3), and the detected temperature is higher than the set temperature. While low (NO in step 3), the engine 13 judges that the warming up is incomplete, the sound-blocking rectifying plate 27 is closed, and the amount of air sucked into the cooling device chamber 20 is reduced, and the cooling package 21 Continue the warm-up operation by limiting the cooling capacity of).

On the other hand, when the engine cooling water temperature detected by the temperature sensor 42 becomes higher than the set temperature (YES in step 3), the control panel 44 determines that the warming-up of the engine 13 is completed, and the actuator 41 As a result, the sound blocking rectification plate 27 is driven to the control state shown by the solid line in FIG. 10 (step 4).

In this way, based on the temperature of the cooling package 21 detected by the temperature sensor 42, the control panel 44 rotates the sound blocking rectifying plate 27 by the actuator 41, and the side door 3b. By varying the intake air flow rate or the intake path sucked in from the side intake hole 7), it is possible to cope with a change in the operating conditions of the hydraulic excavator.

Similarly, the control panel 44 rotates the sound blocking rectification plate 27 by the actuator 41 to variably adjust the intake air flow rate or intake path sucked from the upper intake hole 6 of the upper cover 3a. It is also possible to respond to changes in the operating conditions of the hydraulic excavator.

Next, FIGS. 12 to 17 show various embodiments of the cooling package 21, and the cooling package 21 includes a heat exchanger 11ra of a radiator for cooling the cooling water of the engine 13 and a hydraulic circuit. Engine intake compressed by the heat exchanger 11oi of the oil cooler for cooling the working oil, the condenser 11co of the air conditioning circuit used for temperature adjustment in the cap 4, and the turbocharger installed in the intake system of the engine 13. Since a plurality are selected and combined from the heat exchanger 11af of the aftercooler which cools the cooling fan, the rotational position of the sound blocking rectifying plate 27 may be variably adjusted according to the combination structure of these and the cooling fan.

For example, the combination structure of the heat exchanger 11ra of the radiator, the heat exchanger 11oi of the oil cooler, the condenser 11co of the air conditioning circuit, and the heat exchanger 11af of the aftercooler shown in FIG. In the case of the combined structure of the radiator heat exchanger 11ra, the oil cooler heat exchanger 11oi, and the air conditioner condenser 11co, the inclination angle of the sound blocking rectifying plate 27 is further lowered (passing through the cooling air). In the case of the combination structure of the heat exchanger 11ra of the radiator, the heat exchanger 11oi of the oil cooler, and the heat exchanger 11af of the after cooler shown in FIG. Compared with the case shown, the inclination angle of the sound blocking rectifying plate 27 is adjusted upward.

Moreover, in the case of the combined structure which arrange | positioned the heat exchanger 11af of the after cooler from the heat exchanger 11ra of the radiator to the heat exchanger 11oi of the oil cooler shown in FIG. 15, FIG. 16, and 17, the overall heat balance According to this, the inclination angle of the sound blocking rectifying plate 27 is variably adjusted.

In this way, the overall structure of the cooling package 21 is formed by the combined structure of the heat exchanger 11ra of the radiator, the heat exchanger 11oi of the oil cooler, the condenser 11co of the air conditioning circuit and the heat exchanger 11af 'of the after cooler. Even if the temperature distribution changes, it is possible to appropriately distribute the intake air amount in response to the temperature distribution by variably adjusting the rotational position of the sound-blocking rectifying plate 27.

On the other hand, in each of the illustrated embodiments, the sound-blocking rectifying plate 27 is freely axially supported by the hinge 26 as the pivot shaft disposed between the upper intake hole 6 and the side intake hole 7. As a result, the attachment structure of the sound blocking rectifying plate 27 is simple, but in some cases, the sound blocking rectifying plate 27 is slid between the upper intake hole 6 and the side intake hole 7. You may guide and install it movable.

The present invention can be applied not only to hydraulic excavators, but also to cooling apparatuses of other working machines such as bulldozers and loaders.

Claims (7)

A cooling package with a heat exchanger and a cooling fan, An upper cover installed at the top of the cooling package, A side cover installed on one side of the upper cover opposite the cooling package, An upper intake hole opened between the side cover and the cooling package in the upper cover, A side intake hole opened in the upper side adjacent to the upper cover in the side cover, A work which is provided between the upper intake hole and the side intake hole, is provided with a sound blocking rectifying plate which blocks internally generated sound and rectifies the intake air sucked from the upper intake hole and the side intake hole. Chiller of machine. 2. The rotating shaft as set forth in claim 1, further comprising a rotating shaft disposed between the upper intake hole and the side intake hole. The sound blocking rectifying plate is a cooling device for a working machine, characterized in that the rotation is freely supported by the rotation shaft portion. The hinge according to claim 1 or 2, further comprising: a hinge provided with a base end of the sound blocking rectifying plate on a lower surface of the upper cover; Cooling device of a working machine, characterized in that the locking means for fixing the front end of the sound-blocking rectifying plate folded in a folded state on the lower surface of the upper cover. The cooling device of a working machine according to any one of claims 1 to 3, wherein a plurality of sound blocking rectifying plates are provided. The side cover according to claim 1 or 2, wherein the side cover is a side door which is freely opened and closed by an outer opening, A sound blocking rectifying plate is attached to this side door. The actuator according to any one of claims 1 to 5, further comprising: an actuator for operating the sound blocking rectifying plate; A temperature sensor for detecting temperature information of the cooling package, And control means for controlling the actuator based on temperature information from the temperature sensor to control the angle of the sound-blocking rectifying plate. The method according to any one of claims 1 to 6, Cooling package, From the heat exchanger of the radiator for cooling the cooling water of the engine, the heat exchanger of the oil cooler for cooling the hydraulic oil of the hydraulic circuit, the condenser of the air conditioning circuit, and the heat exchanger of the aftercooler for cooling the engine intake compressed by the turbocharger, Selected and combined, The sound blocking rectifying plate is movable adjusted according to these combination structures.

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