JP5363160B2 - Construction equipment dustproof device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dustproof device for construction machinery, which can suppress the clogging of a dustproof net on an operation site producing much dust. <P>SOLUTION: The dustproof net 8 is inclined in such a manner that an upper end gets closer to the side of an opening 22 and that a lower end gets closer to the side of a heat exchanger unit 10. A distance is produced in the horizontal direction of cooling air between the dustproof net 8 and the dust colliding with the dustproof net 8 and falling by gravitation; and the falling dust can be hardly recaptured by the dustproof net 8, and reaches a lower portion of an engine compartment 1. Additionally, the dust captured by the dustproof net 8 partially falls by gravitation, and reaches the lower portion of the engine compartment 1. This can suppress the clogging of the dustproof net 8. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a dustproof device for a construction machine such as a hydraulic excavator, and more particularly to a dustproof device for a construction machine provided with a dustproof net that captures dust in cooling air.

  In construction machines such as hydraulic excavators, excavation work is performed by operating actuators that drive booms, arms, and buckets. A hydraulic pump is driven by an engine as a power source, and hydraulic actuators are pumped to a hydraulic cylinder to operate each actuator. When the engine and hydraulic pump are operated, heat is generated in the engine and hydraulic fluid. Therefore, heat exchangers such as radiators and oil coolers are installed for cooling engine coolant and hot hydraulic oil. The cooling air induced by the cooling fan passes through the heat exchanger, whereby the heat exchanger is cooled. A device for cooling the heat exchanger is called a cooling device.

  Furthermore, due to recent regulations on exhaust gas, construction machines equipped with an intercooler are becoming mainstream in order to reduce the concentration of nitrogen oxides in the exhaust gas. The intercooler cools the engine intake air that is turbo-charged and adiabatically compressed to a predetermined temperature, increases the charging efficiency, and lowers the combustion temperature, thereby suppressing the generation of NOx (nitrogen oxides) in the exhaust. . In addition, a condenser for cooling the refrigerant of the air conditioner may be installed.

  Such construction machines often operate in spaces where dust is floating around, such as industrial waste treatment plants and forestry, so that the surrounding dust is not sucked into the heat exchanger together with the cooling air. In addition, a dustproof net is provided on the upstream side of the cooling air of the heat exchanger so as to face the heat exchanger.

  The dust-proof net captures dust in the cooling air, but if dust accumulates on the dust-proof net and becomes clogged, the amount of cooling air is reduced and the cooling performance of the heat exchanger is reduced. Therefore, it is necessary to frequently clean the dustproof net to remove clogging. In a so-called series arrangement type heat exchanger unit that has been widely employed in the past, it is necessary to provide a dustproof net for each heat exchanger, and it is also necessary to clean the dustproof net individually. Moreover, since the dust-proof net | network provided in the heat exchanger arrange | positioned downstream is difficult to access, cleaning was difficult.

  In order to improve the ease of cleaning of such a dustproof net, the technique described in Patent Document 1 has been proposed. The dustproof device described in Patent Document 1 is provided with a common dustproof net so as to face a parallel heat exchanger unit in which heat exchangers such as a radiator, an oil cooler, and an intercooler are arranged in parallel. Thereby, it is only necessary to clean one dustproof net, and the ease of cleaning can be improved.

JP 2006-52689 A

  As described above, the dustproof device described in Patent Document 1 can improve the ease of cleaning, but does not suppress clogging of the dustproof net itself. Since cleaning of the dustproof net involves attaching and detaching the dustproof net, it is preferable that the frequency of cleaning is low. However, if the clogging of the dust-proof net is left unattended, the cooling air volume decreases and the cooling performance of the heat exchanger decreases, causing various problems. For example, if the cooling performance of the radiator decreases, the engine will overheat.

  Although it is conceivable to cope with the decrease in cooling performance by increasing the capacity of the heat exchanger, it is not realistic because the space for mounting the heat exchanger in the engine room is limited.

  In addition, in the conventional dustproof device, the line connecting the opening for taking in the cooling air and the cooling fan becomes the main path of the cooling air, so that dust concentrates on the main path of the cooling air, and the cooling air path and the dustproof net are There is a problem in that dust is concentrated and captured in the intersecting peripheral area, and clogging is likely to occur.

  An object of the present invention is to provide a dustproof device for a construction machine capable of suppressing clogging of a dustproof net at an operation site where there is a lot of dust.

(1) In order to achieve the above object, the present invention is a cooling system in which a heat exchanger device is cooled by cooling air that is induced by a cooling fan and is taken into an engine room from an upper surface portion or a side surface opening portion of a construction equipment cover. In a dustproof device for a construction machine provided with a dustproof net that is provided in the apparatus so as to be positioned upstream of the cooling air of the heat exchanger device and is captured in the cooling air, it is introduced from the opening of the side part. dust dustproof net to catch cooling air in the upper end portion is placed inclined so as the lower end closer to the opening side is closer to the heat exchanger apparatus, further opening of the side surface portion of the engine compartment Against the flow of the cooling air in the middle of the horizontal distance between the upper end and the lower end of the dust-proof net installed on the inclination and on the main path of the cooling air connecting the cooling fan and the cooling fan The main cooling air Dust contained in the road is provided a partition member dustproof provided so as to fall and collide.

  In the present invention configured as described above, since the dustproof net is installed at an inclination as described above, the distance in the horizontal direction of the cooling air between the dustproof net and the dust that collides with the dustproof net and falls due to gravity. Occurs. Due to this distance, the falling dust is difficult to be captured by the dustproof net again and reaches the lower part of the engine compartment. Thereby, clogging of the dustproof net can be suppressed.

  Further, since the dustproof net is installed at an inclination, part of the dust trapped in the dustproof net falls due to gravity and reaches the lower part of the engine compartment. Thereby, clogging of the dustproof net can be suppressed.

Further, on the main path of the cooling air connecting the opening on the side surface in the engine room and the cooling fan, and in the middle of the horizontal distance between the upper end and the lower end of the dustproof net installed at an inclination, the cooling air The dust included in the main path of the cooling air taken in from the opening of the side surface is provided by providing a dustproof partition plate that collides and falls with the dust included in the main path of the cooling air against the flow of Then, it collides with the dustproof partition member and falls. Since the dustproof net is installed at an inclination, a distance is generated in the horizontal direction of the cooling air between the falling dustproof net and the dustproof net, and the falling dust is difficult to be captured by the dustproof net and reaches the lower part of the engine compartment. Thereby, clogging of the dust-proof net in the operation site with much dust can be suppressed.

The dust accumulated in the lower part of the engine compartment is blown off by the wind pressure of the compressor and is released from an opening provided on the upstream side of the engine compartment bottom cooling air. As a result, the engine compartment can be easily cleaned.

As a result of suppressing the clogging of the dust-proof net at the operation site where there is a lot of dust, the cleaning effort can be reduced by reducing the frequency of cleaning the dust-proof net. It is possible to prevent the engine from being overheated by reducing the trouble of cleaning the dustproof net and easily cleaning the engine compartment.

(2) In the above (1), preferably, the dustproof partition member is provided so as to be positioned on the upstream side of the cooling air of the dustproof net.

By providing the dustproof partition member as described above , the dust included in the main path of the cooling air as described in the above (1) collides with the dustproof partition member and falls. Since the dustproof net is installed at an inclination, a distance is generated in the horizontal direction of the cooling air between the falling dustproof net and the dustproof net, and the falling dust is difficult to be captured by the dustproof net and reaches the lower part of the engine compartment. Thereby , clogging of the dust-proof net in the operation site with much dust can be suppressed.

(3) In the above (1), preferably, the dustproof partition member divides and holds the dustproof net vertically.

By providing the partition member as described above , the dust included in the main path of the cooling air as described in the above (1) collides with the dust-proof partition member and falls. Since the dustproof net is installed at an inclination, a distance is generated in the horizontal direction of the cooling air between the falling dustproof net and the dustproof net, and the falling dust is difficult to be captured by the dustproof net and reaches the lower part of the engine compartment. Thereby, clogging of the dust-proof net in the operation site with much dust can be suppressed.

In addition, the dust-proof partitioning member holds the dust-proof net vertically and maintains the size of the dust-proof device, while the dust-proof net forms a larger inclination angle than the configuration where the dust-proof net is not divided. can do. As the inclination angle increases, the effect of suppressing clogging of the dustproof net can be improved.

  On the other hand, when the inclination angle of the dustproof net is constant, the configuration of the dustproof device can be realized in a smaller space than the configuration in which the dustproof net is not divided.

(4) In the above (3), preferably, the dustproof partition member is inclined such that the upper end portion approaches the heat exchange device side and the lower end portion approaches the opening portion side.

By providing the dustproof partition member in an inclined manner as described above, the dustproof net can form a larger inclination angle as compared with the configuration in which the partition member is provided vertically while maintaining the size of the dustproof device. . As the inclination angle increases, the effect of suppressing clogging of the dustproof net can be improved.

On the other hand, when the inclination angle of the dust protective net constant, compared with the configuration partition member dustproof is provided vertically, it can be implemented in an even more space-saving construction of the dust-proof device.

Thus, the dustproof partition member is provided to be inclined, so that the flow passage area of the cooling air is increased. Thereby, the wind speed of cooling air falls and the dust which passes per unit time unit area also reduces. As a result, the dust net is less likely to be clogged. In addition, an improvement in cooling efficiency of the cooling device can be expected due to a decrease in ventilation resistance.

  ADVANTAGE OF THE INVENTION According to this invention, clogging of a dustproof net | network at the operation site with much dust can be suppressed. As a result, the engine can be prevented from overheating.

It is sectional drawing which shows the engine room provided with the dustproof apparatus of the construction machine concerning the reference drawing of this invention. It is a top view of an engine room. 1 is an overall view of a hydraulic excavator that is an example of a construction machine to which the present embodiment is applied. It is sectional drawing which shows the engine room provided with the conventional dustproof apparatus for the comparison. It is sectional drawing which shows the engine room with which the dustproof apparatus of the construction machine concerning 1st Embodiment of this invention is provided. It is sectional drawing which shows the engine room with which the dustproof apparatus of the construction machine concerning 2nd Embodiment of this invention is provided. It is a perspective view of an engine room. It is sectional drawing which shows the engine room with which the dustproof apparatus of the construction machine concerning 3rd Embodiment of this invention is provided. It is sectional drawing which shows the engine room with which the dustproof apparatus of the construction machine concerning 4th Embodiment of this invention is provided. It is sectional drawing which shows the engine room with which the dustproof apparatus of the construction machine concerning 5th Embodiment of this invention is provided. It is sectional drawing which shows the engine room provided with the dustproof apparatus of the construction machine concerning the reference example of this invention.

  Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing an engine room 1 provided with a dustproof device for a construction machine according to a reference diagram of the present invention. FIG. 2 is a plan view of the engine compartment 1. FIG. 5 is a cross-sectional view showing an engine room 1A provided with a dustproof device for a construction machine according to the first embodiment of the present invention. The configuration of the first embodiment will be described with reference to FIGS. 1 , 2 and 5 .

  The dustproof device of the present embodiment is provided in the engine compartment 1. The engine compartment 1 is covered with a building cover 27 on the outside, and openings 21 and 22 for taking in cooling air are formed in the building cover 27. A dustproof net 26 is provided in the opening 21 on the upper surface. In the engine chamber 1, a heat exchanger unit 10, a fuel cooler 14, a condenser 15, a shroud 4 provided on the downstream side of the heat exchanger unit 10, and cooling air for cooling the heat exchanger unit 10 are induced. A cooling fan 3 is provided, and these constitute a cooling device.

  The engine 2 is supported in the engine chamber 1 via an engine mount (not shown). A hydraulic pump (not shown) is attached to a drive shaft on the flywheel side of the engine 2. The cooling fan 3 is attached to a drive shaft opposite to the hydraulic pump, and is driven by the engine 2 to induce cooling air. The heat exchanger unit 10 is arranged so as to face the cooling fan upstream of the cooling fan 3, and includes a radiator 11, an oil cooler 12, and an intercooler 13 arranged in parallel in the cooling air direction. The fuel cooler 14 and the air conditioner condenser 15 are arranged in parallel so as to face each other on the cooling air upstream side of the heat exchanger unit 10.

  The cooling fan 3 is a so-called axial fan, and is attached to the auxiliary rotating shaft 34. A fan pulley 32 is fixed to the auxiliary rotating shaft 34 so as to be at a position corresponding to the crank pulley 31 of the engine crankshaft 35. A fan belt 33 is stretched between the crank pulley 31 and the fan pulley 32. The cooling fan 3 includes a boss 3a fixed to an auxiliary rotating shaft 34 to which a driving force from the engine crankshaft 35 is transmitted, and a plurality of blades 3b fixed around the boss 3a. Driven by the rotation of the shaft 34, a negative pressure is generated between the cooling fan 3 and the heat exchanger unit 10 to induce cooling air.

  A battery 18 is installed upstream of the cooling air at the bottom of the engine compartment 1. The battery 18 is a power source for electrical components, for example, a cell motor is rotated when the engine is started.

  The dust-proof net 8 captures dust in the cooling air taken in from the opening 22 on the side surface, is located upstream of the condenser 15 cooling air, and has an upper end fixed to the air guide 25 of the opening 21. Then, the lower end portion is fixed to the lower frame of the heat exchanger unit 10, so that the upper end portion is inclined toward the opening portion 22 side and the lower end portion is inclined toward the heat exchanger unit 10 side. The dust-proof net 8 has a mesh structure, and in a normal case, the mesh roughness is configured with an interval smaller than the fin pitch interval of the heat exchanger.

Furthermore, a dustproof partition member 9 is provided on the main cooling air path connecting the opening 22 and the cooling fan 3 and on the upstream side of the cooling air of the dustproof net 8.

FIG. 3 is an overall view of a hydraulic excavator that is an example of a construction machine to which the present embodiment is applied.

The excavator 101 includes a frame 104 that constitutes an upper swing body 103 on a lower traveling body 102, and includes an engine chamber 1, a cabin 105, and a counterweight 106 on the frame 104. Further, a front attachment 110 including a boom 111 and a boom cylinder 112, an arm 113 and an arm cylinder 114, a bucket 115 and a bucket cylinder 116 is provided in front of the vehicle body.

Next, the operation and action of the present embodiment configured as described above will be described.

When the engine 2 is driven during operation of the hydraulic excavator, the rotation of the crankshaft 35 is transmitted to the auxiliary rotation shaft 34 via the crank pulley 31, the fan belt 33, and the fan pulley 32. Thereby, the cooling fan 3 is driven and rotated. By the rotation of the cooling fan 3, outside air is taken into the engine compartment 1 from the openings 21 and 22 and flows as cooling air from the upstream side to enter the condenser 15 and the heat exchanger unit 10 (the radiator 11, the oil cooler 12, After the intercooler 13) is cooled, it is squeezed through the inside of the shroud 4 on the downstream side of the heat exchanger unit 10 and introduced into the suction side of the cooling fan 3. Thereafter, the cooling air blown out from the cooling fan 3 cools the engine 2, the hydraulic pump, and the like on the downstream side of the cooling fan 3, and then is discharged from the openings 23 and 24 to the outside of the engine room 1.

When the excavator 101 is operated in a place where there is a lot of dust or dust, the cooling air flowing from the openings 21 and 22 flows into the engine compartment 1 with dust. At this time, dust having a particle diameter smaller than the mesh roughness of the dust-proof net 8 passes through the dust-proof net 8 and passes between the heat exchanger units 10 by the cooling air in the engine compartment 1 because the specific gravity is small. The parts 23 and 24 are discharged to the outside of the engine compartment 1 together with the cooling air. On the other hand, dust having a particle size larger than the roughness of the mesh of the dustproof net 8 is captured by the dustproof net 8.

However, some of the dust collides with the dustproof net 8 and falls due to gravity. Since the dustproof net 8 is installed at an inclination, a distance is generated in the horizontal direction of the cooling air between the falling dust and the dustproof net 8. Due to this distance, the falling dust is difficult to be captured by the dustproof net 8 again and reaches the lower part of the engine compartment 1. Thereby, clogging of the dustproof net 8 can be suppressed.

In addition, since the dustproof net 8 is installed at an inclination, part of the dust trapped in the dustproof net 8 falls due to gravity and reaches the lower part of the engine compartment 1. Thereby, clogging of the dustproof net 8 can be suppressed.

Furthermore, the dust contained in the main path of the cooling air taken in from the opening 22 on the side surface collides with the dustproof partition member 9 and falls. Since the dustproof net 8 is inclined , a distance is generated in the horizontal direction of the cooling air between the falling dustproof net and the dustproof net 8, and the falling dust is difficult to be captured by the dustproof net 8, and the lower part of the engine compartment 1A To reach. Thereby, clogging of the dustproof net 8 at the operation site where there is a lot of dust can be suppressed.

Cleaning of the engine room 1 is performed using a compressor by opening and closing the building cover 27. The dust accumulated in the lower part of the engine chamber 1 is blown off by the wind pressure of the compressor and is discharged from an opening (not shown) provided on the cooling air upstream side of the bottom of the engine chamber 1. Thereby, the inside of the engine compartment 1 can be easily cleaned.

The effect of the present embodiment configured as described above will be described in comparison with a conventional dustproof device.

FIG. 4 is a cross-sectional view showing an engine room provided with a conventional dustproof device for comparison. The same components as those in FIG. 1 are denoted by the same reference numerals. In the first embodiment, the dust-proof net 8 is inclined so that the upper end portion approaches the opening 22 side and the lower end portion approaches the heat exchanger unit 10 side, whereas the dust-proof net 80 is provided with the heat exchanger unit 10. And it is installed vertically so as to face the capacitor 15.

Dust having a particle size larger than the roughness of the mesh of the dustproof net 80 is captured by the dustproof net 80. Since the dustproof net 80 is installed vertically, it is difficult to fall once the dust is captured. When the dust collides with the dust-proof net 80 and falls due to gravity, the dust-proof net 80 is installed vertically, so that there is no distance in the horizontal direction of the cooling air between the falling dust and the dust-proof net 80, and the fall. The dust to be captured is again captured by the dustproof net 80. When dust accumulates on the dustproof net 80, clogging occurs. If the clogging of the dust-proof net 80 is left unattended, the amount of cooling air decreases and the cooling performance of the heat exchanger decreases, causing various problems. For example, if the cooling performance of the radiator 11 is lowered, the engine 2 is overheated. Therefore, it is necessary to frequently clean the dustproof net 80 to remove clogging. Cleaning the dust-proof net 80 involves attaching and detaching the dust-proof net 80. Therefore, it is troublesome if the dust-proof net 80 is easily clogged and the cleaning frequency increases.

In the conventional dustproof device of FIG. 4, the line connecting the opening 22 for taking in cooling air and the cooling fan 3 becomes the main path of the cooling air. As a result, the dust concentrates on the main path of the cooling air, and the cooling air path and the dustproofing There is a problem that dust is concentrated and captured in a peripheral area where the net 80 intersects (in the vicinity of the capacitor 15 in FIG. 4), and the dustproof net 80 is easily clogged.

In contrast, in the present embodiment, as described above, the dust-proof net 8 is inclined and the line connecting the cooling fan 3 and the opening 22 for taking in the cooling air is included in the main path of the cooling air. The dust collides with the dustproof partition member 9 and falls. Since the dustproof net 8 is inclined, a distance is generated in the horizontal direction of the cooling air between the falling dustproof net and the dustproof net 8, and the falling dust is difficult to be captured by the dustproof net 8, and the lower part of the engine compartment 1A To reach. Thereby, clogging of the dust-proof net 8 at the operation site with much dust can be suppressed.

Moreover, dust accumulates in the lower part of the engine compartment 1, and the interior of the engine compartment 1 can be easily cleaned as described above.

As a result of the clogging of the dustproof net 8 being suppressed, the cleaning effort can be reduced by reducing the frequency of cleaning the dustproof net 8. It is possible to prevent the engine 2 from being overheated by reducing the labor for cleaning the dust-proof net 8 and easily cleaning the inside of the engine compartment 1.

A second embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is a cross-sectional view showing an engine room 1B provided with a dustproof device for a construction machine according to a second embodiment of the present invention, and FIG. 7 is a perspective view of the engine room 1B. The second embodiment is a modification of the first embodiment.

A dustproof partition member (hereinafter referred to as a partition member) 9B is provided on the cooling air path connecting the opening 22 and the cooling fan 3 so as to be fixed substantially vertically to the brackets 28a and 28b.

  The dust-proof net 8B is divided into an upper dust-proof net 8Ba and a dust-proof net 8Bb and is held by a partition member 9B. The dustproof net 8Ba has an upper end fixed to the air guide 25 of the opening 21 and a lower end fixed to the upper end of the partition member 9B, so that the upper end approaches the opening 22 and the lower end is a heat exchanger. It inclines so that it may approach the unit 10 side. The dust-proof net 8Bb has an upper end fixed to the lower end of the partition member 9B and a lower end fixed to the lower frame of the heat exchanger unit 10, whereby the upper end approaches the opening 22 side and the lower end is heat exchanged. It inclines so that the container unit 10 side may be approached.

The partition member 9B divides the dustproof net 8B into upper and lower parts and maintains the same space as the first embodiment (the length of the dustproof device in the horizontal direction of the cooling air), while the dustproof nets 8Ba and 8Bb are Compared to the dustproof net 8 of the second embodiment, a larger inclination angle can be formed. As the inclination angle increases, the effect of suppressing clogging of the dustproof net 8 described above in the first and second embodiments is further increased.

On the other hand, when the dust protective net 8Ba, the inclination angle of the dust protective net 8 of inclination of the first embodiment of 8Bb equivalent, can be realized in a space-saving configuration of a dust device in comparison with the first embodiment.

Also in the present embodiment configured as described above, the dust-proof nets 8Ba and 8Bb are installed at an inclination, so that the dust-proof net 8 is clogged at the operation site where there is a lot of dust as in the first embodiment. Can be suppressed. Furthermore, by providing the partition member 9B, it is possible to suppress clogging of the dust-proof net 8B at the operation site where there is a lot of dust as in the first embodiment.

  Furthermore, in this embodiment, the partition member 9B can divide and hold the dust-proof net 8B in the upper and lower directions, thereby improving the clogging suppression effect or realizing the configuration of the dust-proof device in a space-saving manner.

A third embodiment of the present invention will be described with reference to FIG.

FIG. 8 is a cross-sectional view showing an engine room 1C provided with a dustproof device for a construction machine according to a third embodiment of the present invention. The third embodiment is a modification of the second embodiment, and the partition member 9B of the second embodiment is provided substantially vertically, whereas the partition member 9C of the third embodiment is provided inclined. Yes.

  The partition member 9C is fixed to the brackets 28a and 28b on the cooling air path connecting the opening 22 and the cooling fan 3, so that the upper end approaches the heat exchanger unit 10 side and the lower end approaches the opening 22 side. It is provided with an inclination.

  The dustproof net 8C is divided into an upper dustproof net 8Ca and a dustproof net 8Cb in the vertical direction and is held by a partition member 9C. The dustproof net 8Ca has an upper end fixed to the air guide 25 of the opening 21 and a lower end fixed to the upper end of the partition member 9C, so that the upper end approaches the opening 22 and the lower end is a heat exchanger. It inclines so that it may approach the unit 10 side. The dust-proof net 8Cb has an upper end fixed to the lower end of the partition member 9C and a lower end fixed to the lower frame of the heat exchanger unit 10, whereby the upper end approaches the opening 22 and the lower end is heat exchanged. It inclines so that the container unit 10 side may be approached.

By providing the partition member 9C in an inclined manner, the dustproof nets 8Ca and 8Cb maintain a space equivalent to that of the second embodiment, and the dustproof nets 8Ba and 8Bb have an even greater inclination angle than the dustproof nets 8Ba and 8Bb of the second embodiment. Can be formed. As the inclination angle increases, the effect of suppressing clogging of the dustproof net 8B described above in the third embodiment is further increased.

On the other hand, dust protective net 8Ca, the inclination angle of 8Cb and dustproof net 8Ba of the second embodiment, when the equivalent angle of inclination of the 8Bb, can be realized in a space-saving configuration of a dust device in comparison with the second embodiment.

By the way, when the partition members 9 and 9B are provided on the cooling air path connecting the opening 22 and the cooling fan 3 as in the first embodiment and the second embodiment, the partition members 9 and 9B become a ventilation resistance, and cooling is performed. The cooling efficiency of the device is reduced. Further, since the flow passage area of the cooling air is reduced by the amount of the partition members 9 and 9B, the wind speed of the cooling air is increased, and the dust passing per unit time unit area is also increased. As a result, the dustproof nets 8 and 8B may be easily clogged.

In the present embodiment, the partition member 9C is provided to be inclined, so that the flow passage area of the cooling air is increased as compared with the first and second embodiments. Thereby, the wind speed of cooling air falls and the dust which passes per unit time unit area also reduces. As a result, the dustproof net 8C is less likely to be clogged. In addition, an improvement in cooling efficiency of the cooling device can be expected due to a decrease in ventilation resistance.

In this embodiment configured as described above, similarly to the second embodiment及, dusty operation site in the dustproof net 8Ca, it is possible to suppress the clogging of 8Cb.

  Furthermore, in this embodiment, since the partition member 9C is provided to be inclined, the clogging suppression effect can be improved, or the configuration of the dustproof device can be realized in a space-saving manner. In addition, an improvement in cooling efficiency of the cooling device can be expected due to a decrease in ventilation resistance.

A fourth embodiment of the present invention will be described with reference to FIG.

FIG. 9 is a cross-sectional view showing an engine room 1D provided with a dustproof device for a construction machine according to a fourth embodiment of the present invention. The fourth embodiment is a modification of the third embodiment, and the upper dustproof net 8Ba of the third embodiment is fixed to the most upstream side of the cooling air of the air guide 25 of the opening 21. On the other hand, the upper dustproof net 8Da of the fifth embodiment is fixed to the most downstream side of the cooling air of the air guide 25 of the opening 21 at the upper end.

The dustproof devices of the first to third embodiments target dust flowing from the side opening 22, and the dust in the cooling air flowing from the top opening 21 is captured by the dustproof net 26. In general, dust having a large particle diameter that causes clogging of the dustproof net often flows from the opening 22 on the side surface, and the dustproof net 26 provided in the opening 21 on the upper surface is clogged. Few. However, in an operation site where there is a lot of dust such as industrial waste treatment, the dust-proof net 26 may be clogged depending on the situation. The present embodiment also corresponds to dust in the cooling air flowing from the opening 21.

The partition member 9 </ b> D is provided on the cooling air path connecting the opening 22 and the cooling fan 3 so as to be fixed substantially vertically to the brackets 28 a and 28 b. Compared to the partition member 9B of the second embodiment, it is located slightly downstream of the cooling air.

  The dust-proof net 8D is vertically divided into an upper dust-proof net 8Da and a dust-proof net 8Db, and is held by a partition member 9D. The dustproof net 8Ba has an upper end fixed to the most upstream side of the cooling wind of the air guide 25 of the opening 21 and a lower end fixed to the upper end of the partition member 9D, so that the upper end approaches the opening 22 side. It inclines so that a lower end part may approach the heat exchanger unit 10 side. The dustproof net 8Db has an upper end fixed to the lower end of the partition member 9D, and a lower end fixed to the lower frame of the heat exchanger unit 10, whereby the upper end approaches the opening 22 and the lower end is heat exchanged. It inclines so that the container unit 10 side may be approached.

Also in the present embodiment configured as described above, as in the second embodiment, the dust-proof net 8D is clogged at the operation site where there is a lot of dust with respect to the dust in the cooling air flowing from the opening 22 on the side surface. Can be suppressed.

  Furthermore, in this embodiment, it has the same effect also with respect to the dust in the cooling air which flows in from the opening part 21 of an upper surface.

Further, the dust-proof net 26 of the first to third embodiments is not necessary, which is advantageous in terms of cost by reducing the number of members.

A fifth embodiment of the present invention will be described with reference to FIG.

FIG. 10 is a cross-sectional view showing an engine room 1E provided with a dustproof device for a construction machine according to a fifth embodiment of the present invention. In the present embodiment, a dustproof net 8E is provided on the building cover 27E.

  The engine room 1E is covered with a building cover 27E so that it can be opened and closed. The building cover 27E has a cover upper part 27Ea, opening forming members 27Eb to 27d and a cover lower part 27Ee on the side surface, and an opening forming member 27Ef on the upper surface. The building cover 27E is formed with openings 21E and 22E for taking in cooling air. In the present embodiment, the region formed by the cover upper portion 27Ea and the opening forming member 27Ef is the upper opening portion 21E, and the planar region formed vertically by the most upstream cooling air of the building cover 27E is the opening portion on the side surface side. 22E. That is, an area including the lower end of the cover upper portion 27Ea and the lower ends of the opening forming members 27Eb to 27d is the opening 22E.

  The opening forming members 27Eb to 27Ed are provided so as to be inclined so that the upper end portion approaches the heat exchanger unit 10 side and the lower end portion approaches the opening portion 22E side.

  The dustproof net 8E is divided into upper and lower dustproof nets 8Ea to 8d and provided on the building cover 27E. The dustproof net 8Ea has an upper end fixed to the lower end of the cover upper portion 27Ea, a lower end fixed to the upper end of the opening forming member 27Eb, and the dustproof net 8Eb has an upper end fixed to the lower end of the opening forming member 27Eb. The lower end is fixed to the upper end of the opening forming member 27Ec, and the dustproof net 8Ec has the upper end fixed to the lower end of the opening forming member 27Ec, the lower end fixed to the upper end of the opening forming member 27Ed, and the dustproof net 8Ed. The upper end portion is fixed to the upstream end of the opening forming member 27Ef, and the lower end portion is fixed to the most upstream side of the cooling wind of the air guide 25 of the opening portion 21E. The portion is inclined so as to approach the opening 22E side and the lower end portion approaches the heat exchanger unit 10 side.

  Also in the present embodiment configured as described above, the dust-proof nets 8Ea-d are installed at an inclination, so that the dust-proof nets 8Ea-d at the operation site where there is a lot of dust are installed as in the first embodiment. Clogging can be suppressed.

  Furthermore, the dust-proof net 8E is provided in the building cover 27E, so that dust flowing into the engine room 1E can be reduced, and as a result, the cleaning effort in the engine room 1E can be reduced.

  Further, the dustproof net 8E can be accessed without opening and closing the building cover 27E, and the dustproof net 8E can be easily cleaned without attaching / detaching the dustproof net 8E.

  A reference example of the present invention will be described with reference to FIG.

  FIG. 11 is a cross-sectional view showing an engine room 1F provided with a dustproof device for a construction machine according to a reference example of the present invention. The present embodiment is the same as the conventional dustproof device shown in FIG. 4 with respect to the dustproof net 80, but further includes a partition member 9F in the conventional configuration.

By providing the partition member 9F, it is possible to suppress clogging of the dustproof net 80 at the operation site where there is a lot of dust as in the first embodiment.

DESCRIPTION OF SYMBOLS 1-1F Engine room 2 Engine 3 Cooling fan 4 Shroud 8-8E, 80 Dust-proof net 9-9F Partition member 10 Heat exchanger unit 11 Radiator 12 Oil cooler 13 Intercooler 14 Fuel cooler 15 Capacitor 18 Battery 21, 22, 23, 24 Opening 25 Air guide 26 Dustproof net (top)
27 Building cover 28 Bracket 31 Crank pulley
32 Fan pulley
33 Fan Belt
34 Auxiliary rotating shaft 35 Engine crankshaft 101 Hydraulic excavator 102 Lower traveling body
113 Upper swing body
104 frame 105 cabin
106 Counterweight 110 Front attachment 111 Boom 112 Boom cylinder 113 Arm 114 Arm cylinder
115 buckets
116 bucket cylinder

Claims (4)

A cooling device that is induced by a cooling fan and that cools the heat exchanger device with cooling air introduced into the engine compartment from the top or side opening of the construction equipment cover. In a dustproof device for a construction machine provided with a dustproof net provided to catch dust in cooling air,
Dustproof net to capture dust of the cooling air in taken in from the opening of the side surface portion, the upper end portion is placed inclined so as the lower end closer to the opening side is closer to the heat exchanger apparatus,
Furthermore, on the main path of the cooling air connecting the opening of the side surface portion and the cooling fan in the engine compartment, and in the middle of the horizontal distance between the upper end portion and the lower end portion of the dustproof net installed at an inclination And a dustproof partition member provided so that dust contained in the main path of the cooling air collides and falls against the flow of the cooling air . The dustproof device for a construction machine according to claim 1,
The dustproof device for a construction machine, wherein the dustproof partition member is provided so as to be located upstream of the cooling air in the dustproof net. The dustproof device for a construction machine according to claim 1,
Dustproof device for a construction machine wherein the dust-proof partition member, characterized in that the holding by dividing the dustproof net up and down. The dustproof device for a construction machine according to claim 3,
The dustproof partitioning device for a construction machine, wherein the dustproof partition member is inclined such that an upper end portion approaches the heat exchange device side and a lower end portion approaches the opening side.

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