JP2006242077A - Heat exchange device for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify cleaning work or the like of a heat exchanger by enabling to expose the heat exchanger without detaching a dust-proof net. <P>SOLUTION: The dust-proof net 17 covering a front surface 12D side of the heat exchanger 12 is provided. The dust proof net 17 consists of a left divided net 18 and a right divided net 19 divided into a left and a right direction of a heat exchanging device 11, each divided net 18, 19 is constructed to be able to move a left and a right direction. Consequently, at a time of cleaning dust or the like adhering in the heat exchanger 12, the heat exchanger 12 can be exposed to outside by only moving the left divided net 18 and the right divided net 19 covering the heat exchanger 12 in the right direction and the left direction. Consequently, cleaning work of the heat exchanger 12 can be simply done without detaching each divided net 18, 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchanging device for a construction machine that is preferably used for a construction machine such as a hydraulic excavator or a wheel loader.

  In general, a hydraulic excavator as a construction machine is provided with a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a front-rear side of the upper revolving body that can be raised and lowered. It is roughly constituted by a working device.

  Further, the upper swing body is a swing frame forming a support structure, a cab provided on the front side of the swing frame, on which an operator gets on, an engine mounted on the rear side of the swing frame and driving a hydraulic pump, The heat exchanger is generally constituted by a heat exchange device provided in the vicinity of the engine and a building cover that covers the engine, the heat exchanger, and the like.

  Furthermore, the heat exchange device covers a front surface of the heat exchanger such as a radiator that cools engine coolant, an oil cooler that cools hydraulic oil, and the upstream side of the cooling air from the cooling fan. Thus, it is configured by a dustproof net that captures foreign matter in the cooling air.

  Here, the dust-proof net constituting the heat exchange device is detachably attached to the front side of the heat exchanger so that a cleaning operation for removing dust and the like attached to the heat exchanger can be performed. In addition, in a small hydraulic excavator with a small upper swing body, the space in the building cover is limited, so it is difficult to secure the space required for attaching and detaching the dustproof net that is the same size as the heat exchanger, The dustproof net cannot be easily removed.

  Therefore, in the heat exchange device according to the prior art, the dust-proof net is divided into two in the upward and downward directions so that one divided dust-proof net is miniaturized and the space required for desorption is reduced. Yes (see, for example, Patent Document 1).

JP 2001-12246 A

  In another heat exchange device according to the prior art, the dustproof net is divided into two in the left and right directions, and the upper and lower parts of the dustproof net divided body are attached to the heat exchanger side using butterfly bolts. (For example, refer to Patent Document 2). In this case, when removing and attaching the dust-proof net divided body, the butterfly bolt can be manually tightened or loosened without using a tool such as a spanner.

JP 2003-322488 A

  By the way, in invention of patent document 1 mentioned above, the space | interval required for attachment / detachment is made small by dividing | segmenting a dust-proof net into two in the up and down direction. However, since the dustproof net is configured to be pulled out and extracted in the horizontal direction, a space is required in the direction of extracting the dustproof net in addition to the space for installing the heat exchange device. Also, when removing the dustproof net, the surrounding equipment must be moved, which takes time to clean the heat exchanger. Furthermore, it is difficult to secure a place for the removed dustproof net, and there is a risk that the dustproof net may be damaged by mistake.

  On the other hand, in the invention of Patent Document 2, the upper and lower portions of the dust-proof net divided body are attached to the heat exchanger side using wing bolts. In this case, since the lower side butterfly bolt is in a low position, it is possible to reach and remove the butterfly bolt from the ground by opening the side portion of the building cover. However, the butterfly bolt that stops the upper part of the dustproof net segment is in a high position, so it cannot be reached from the ground. For this reason, the worker has to go up to the upper swing body and detach the butterfly bolt, and there is a problem that workability is poor.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to easily perform a heat exchanger cleaning operation or the like by exposing the heat exchanger without removing the dustproof net. An object of the present invention is to provide a heat exchange device for a construction machine that can be used.

  A heat exchanging device for a construction machine according to the present invention is located on the upstream side of cooling air supplied to the heat exchanger and a heat exchanger that is attached to a frame constituting the construction machine and cools a fluid whose temperature has risen. A dust-proof net provided to cover the front surface of the heat exchanger and catching foreign matter in the cooling air.

  In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the dust-proof net is composed of a plurality of divided nets divided in the left, right direction, or upward and downward directions, Each divided net is configured to be movable leftward, rightward, upward, or downward.

  According to a second aspect of the present invention, each of the divided nets of the dustproof net is configured to move leftward, rightward, upward, or downward within the range of the front surface of the heat exchanger.

  According to a third aspect of the present invention, a rail is provided on the front side of the heat exchanger so as to extend in the left, right, upper, and lower directions and guide the divided nets in the moving direction.

  According to the first aspect of the present invention, for example, when cleaning dust adhering to the heat exchanger, among the plurality of divided nets covering the front surface of the heat exchanger, one divided net is left and rightward. Alternatively, the heat exchanger covered by one of the divided nets can be exposed by moving upward and downward. Further, the remaining heat exchanger can be exposed by moving other divided nets.

  As a result, the heat exchanger can be cleaned without removing or attaching the plurality of divided nets constituting the dustproof net, and workability can be improved. Further, since it is not necessary to remove each divided net, it is possible to prevent a situation in which the dust-proof net is accidentally stepped on, and the life and reliability can be improved.

  According to the second aspect of the present invention, each of the divided nets constituting the dust-proof net moves only to the left, right, or up and down within the range of the front surface of the heat exchanger. Does not require space to move each split net. Therefore, the installation space for the heat exchange device can be reduced, and the degree of freedom in layout can be increased.

  According to invention of Claim 3, each division | segmentation net can be guided along the rail provided in the front side of the heat exchanger, and the movement of each division | segmentation net can be made smooth.

  Hereinafter, as a heat exchanging device for a construction machine according to an embodiment of the present invention, a heat exchanging device for a hydraulic excavator will be described as an example and described in detail with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a crawler-type hydraulic excavator as a construction machine. The hydraulic excavator 1 includes a lower traveling body 2 capable of self-propelling and an upper revolving body 3 mounted on the lower traveling body 2 so as to be capable of swiveling. And a work device 4 that is provided on the front side of the upper swing body 3 so as to be able to move up and down and that performs excavation work of earth and sand.

  Reference numeral 5 denotes a revolving frame constituting the upper revolving structure 3, and the revolving frame 5 is formed as a support structure. Then, as shown in FIG. 2, the revolving frame 5 is provided with a bottom plate 5A made of a thick steel plate or the like extending in the front and rear directions, and standing on the bottom plate 5A. The left and right center beams 5B extending in the rear direction, the left and right center beams 5B being spaced apart from each other and extending in the front and rear directions, the left side frame 5C and the right side frame 5D, and the bottom plate 5A Are provided between the bottom plate 5A and the side frames 5C, 5D, and a plurality of extended beams 5E that support the left and right side frames 5C, 5D at the front ends thereof. The plurality of undercovers 5F are roughly configured. The working device 4 is attached to the front side of each center beam 5B so as to be able to move up and down.

  Reference numeral 6 denotes a cab (see FIG. 1) mounted on the left front side of the revolving frame 5. The cab 6 is carried by an operator. Inside the cab 6 is a driver's seat where the operator is seated, various operation levers, and an air conditioner. An indoor unit (not shown) is provided.

  Reference numeral 7 denotes an engine as a prime mover provided on the revolving frame 5 (see FIG. 2). The engine 7 is mounted in a horizontally placed state extending in the left and right directions, and includes, for example, a supercharger (not shown) that increases the flow rate of intake air. Further, a cooling fan 7A is provided on the left side of the engine 7, and the cooling fan 7A is rotationally driven to circulate cooling air from an inlet 9E of a building cover 9 described later toward an outlet 9F. Further, a hydraulic pump 8 that is driven by the engine 7 and discharges hydraulic oil as pressure oil is attached to the right side of the engine 7.

  Reference numeral 9 denotes a building cover provided between the cab 6 and the counterweight 7 and provided on the revolving frame 5. As shown in FIG. 2, the building cover 9 is located on both the left and right sides of the revolving frame 5 and extends between the left and right side plates 9A extending in the front and rear directions, and the upper ends of the side plates 9A. The upper surface plate 9B extends in the horizontal direction, and a maintenance opening 9C is formed in the upper surface plate 9B. An engine cover 9D is provided on the upper surface plate 9B so as to cover the opening 9C. Here, as shown in FIG. 1, the left side plate 9 </ b> A can be opened with the rear side as a fulcrum, thereby performing a cleaning operation or the like of the heat exchanger 12 described later. The right side plate 9A can also be opened with the rear side as a fulcrum.

  The left side plate 9A of the building cover 9 is formed with an inlet 9E through which cooling air to be supplied to the heat exchanger 12 and the like is introduced, and the right side plate 9A is cooled after passing through the heat exchanger 12, the engine 7 and the like. An outlet 9F is formed through which the wind flows out.

  Further, a vertical plate 9G (only the front side is shown) is provided in the building cover 9 so as to extend to the left and right before and after the heat exchange device 11 described later. These vertical plates 9G are attached to the left side frame 5C of the revolving frame 5, the extended beam 5E, and the like. A lower bracket 15 described later is attached to each vertical plate 9G.

  Next, the heat exchange apparatus according to this embodiment for cooling various fluids such as engine cooling water, hydraulic oil, and intake air with cooling air will be described.

  11 is a heat exchange device provided in the building cover 9 on the left side of the engine 7, and the heat exchange device 11 cools the fluid whose temperature has risen with cooling air generated by the cooling fan 7A. As shown in FIG. 3, the heat exchange device 11 is roughly configured by a heat exchanger 12, brackets 13 and 15, rails 14, a dust net 17, and the like which will be described later.

  Reference numeral 12 denotes a heat exchanger provided at a position facing the cooling fan 7 </ b> A of the engine 7. As shown in FIG. 4, the heat exchanger 12 is supplied from a radiator 12 </ b> A that cools the cooling water whose temperature has been increased by cooling the engine 7, an oil cooler 12 </ b> B that cools hydraulic oil, and a supercharger of the engine 7. And an intercooler 12C for cooling the intake air. Here, the radiator 12A, the oil cooler 12B, and the intercooler 12C are, for example, in parallel with the flow direction of the cooling air generated by the cooling fan 7A so that the cooling efficiency is improved and the cleaning operation is facilitated. The upper revolving unit 3 is arranged in the front and rear direction.

  And the heat exchanger 12 is connected by the below-mentioned upper bracket 13 and the lower bracket 15 attached to the front surface 12D side that is the upstream side of the cooling air, and the upper surface plate of the building cover 9 through the brackets 13 and 15. 9B is attached to each vertical plate 9G.

  Reference numeral 13 denotes an upper bracket which is located on the upper side of the heat exchanger 12 and is attached to the front surface 12D. The upper bracket 13 is formed of, for example, an L-shaped steel material whose upper side is bent toward the front side as shown in FIG. Has been. In addition, the upper bracket 13 is connected to the radiator 12A, the oil cooler 12B, and the intercooler 12C of the heat exchanger 12, and the upper side of the heat exchanger 12 is connected to the upper surface plate 9B of the building cover 9 as shown in FIG. It is to be fixed to.

  Reference numeral 14 denotes a rail provided on the front side of the upper bracket 13, and the rail 14 guides divided nets 18 and 19 of a dustproof net 17 to be described later to the left and right of the heat exchange device 11 as a moving direction. It is. As shown in FIG. 5, the rail 14 is a round bar extending along the upper bracket 13 and is attached to the upper bracket 13 via three stays 14 </ b> A provided at both ends and the center.

  Reference numeral 15 denotes a lower bracket which is located on the lower side of the heat exchanger 12 and is attached to the front surface 12D. The lower bracket 15 is, for example, an L-shape whose lower side is bent to the front side as shown in FIG. It is made of steel. In addition, the lower bracket 15 is configured such that the radiator 12A, the oil cooler 12B, and the intercooler 12C of the heat exchanger 12 are integrally connected, and the lower side of the heat exchanger 12 is connected to each of the building covers 9 as shown in FIG. It is fixed to the vertical plate 9G.

  Reference numeral 16 denotes a screw seat member provided on the front surface side of the lower bracket 15. As shown in FIG. 6, the screw seat member is screwed with butterfly bolts 20 for fixing respective divided nets 18 and 19 to be described later. Have screw holes. Further, the screw seat member 16 projects forward from the front surface of the lower bracket 15 so that an appropriate gap is formed between the heat exchanger 12 and each of the divided nets 18 and 19.

  Reference numeral 17 denotes a dust-proof net (see FIGS. 2 and 3) according to the present embodiment constituting the heat exchange device 11. The dust-proof net 17 is positioned upstream of the cooling air to catch foreign matter such as pebbles, insects, and dust in the cooling air supplied to the heat exchanger 12, and the front surface 12D of the heat exchanger 12. Covering. The dustproof net 17 is divided into two parts in the left and right directions, and is composed of a left divided net 18 and a right divided net 19 that are movable in the same left and right direction within the range of the front surface 12D of the heat exchanger 12. Yes.

  Reference numeral 18 denotes a left divided net disposed on the left side of the heat exchanger 11 so as to cover the oil cooler 12B of the heat exchanger 12. The left divided net 18 covers substantially the left half of the heat exchanger 12, the upper side is movably hooked to the rail 14, and the lower side can be fixed to the screw seat member 16 or the like. As shown in FIG. 7, the left divided net 18 includes a rectangular frame 18A that is long in the upward and downward directions, a net 18B that covers the inside of the frame 18A, and an upper side of the frame 18A. Are formed by two hooks 18C provided at both corners and a mounting plate 18D provided at an intermediate portion in the upper and lower directions on the left side of the frame 18A.

  In addition, the left divided net 18 is fixed to the left side of the heat exchanging device 11 at the lower corners of the frame 18A, the upper right and lower middle portions of the frame 18A, and the mounting plate 18D. A bolt insertion hole 18E through which the butterfly bolt 20 is inserted is formed. Further, the hook 18C is fixed to the rear surface side (the heat exchanger 12 side) of the frame 18A so as not to interfere with the right divided net 19 disposed on the front surface side of the left divided net 18.

  Here, as shown in FIG. 8, the left divided net 18 is formed by hanging the two hooks 18C on the rail 14 of the upper bracket 13 so that the right hook 18C is positioned on the right side of the central stay 14A. As shown in FIG. 9, it can move from the left side to the right side. Further, the left divided net 18 is a position covering the left half (oil cooler 12B) of the heat exchanger 12, and the butterfly bolt 20 inserted through the bolt insertion hole 18E is connected to the vertical plate 9G of the building cover 9, the screw seat member 16, and the like. It can fix to the position by screwing in.

  On the other hand, 19 indicates a right split net disposed on the right side of the heat exchanger 11 so as to cover the radiator 12A and the intercooler 12C of the heat exchanger 12. The right divided net 19 covers substantially the right half of the heat exchanger 12, and is substantially hooked to the rail 14 so that the upper side can be moved, and the lower side is screw seat member 16 in the same manner as the left divided net 18 described above. Etc. can be fixed. Further, the left end of the right divided net 19 overlaps the front side of the left divided net 18.

  The right divided net 19 includes a rectangular frame 19A, a net 19B covering the inside of the frame 19A, two hooks 19C provided on the upper side of the frame 19A, and the frame 19A. The frame 19A and the mounting plate 19D are formed with bolt insertion holes 19E. The mounting plate 19D is provided on the right side. Further, the hook 19C is fixed to the front side of the frame 19A so as not to interfere with the left divided net 18 on the rear side.

  Here, the right split net 19 can be moved from the right side to the left side by hooking the two hooks 19C on the rail 14 so that the left side hook 19C is positioned on the left side of the central stay 14A. Moreover, the right division net | network 19 can be fixed so that it may not move with the butterfly bolt 20 in the position which covered the right half (the radiator 12A, the intercooler 12C) of the heat exchanger 12. FIG.

  Reference numeral 21 denotes a seal member that extends in the upward and downward directions and is provided on both the left and right sides of the heat exchanger 12A. Each of the seal members 21 flows smoothly from the dust-proof net 17 to the heat exchanger 12. So that the surrounding gap is closed. The seal member 21 is formed using a flexible material such as urethane foam.

  The dust-proof net 17 configured in this way covers the radiator 12A, the oil cooler 12B, and the intercooler 12C of the heat exchanger 12 from the upstream side by the divided nets 18 and 19, respectively, so that pebbles, insects, It is possible to catch foreign matters such as dust and prevent the heat exchanger 12 from being clogged or damaged.

  Further, the dust-proof net 17 is attached to the rail 14 within the range of the front surface 12D of the heat exchanger 12, that is, the range not protruding from the heat exchange device 11, by removing the butterfly bolt 20 fixing the divided nets 18 and 19. Along the left and right directions of the heat exchanger 11. As a result, as shown in FIG. 9, the oil cooler 12A can be exposed to the outside by moving the left divided net 18 to the right and placing it on the right divided net 19. On the other hand, the radiator 12A and the intercooler 12C can be exposed to the outside by moving the right divided net 19 to the left and overlapping the left divided net 18.

  The hydraulic excavator 1 provided with the heat exchanging device 11 according to the present embodiment has the above-described configuration. Next, the operation of the hydraulic excavator 1 will be described.

  First, the operator gets on the cab 6 and sits on the driver's seat. By operating the operating lever in this state, the lower traveling body 2 can be driven to move the hydraulic excavator 1 forward or backward. Further, the operator seated in the driver's seat can perform the excavation work of earth and sand, etc. by operating the operation lever for work to move the working device 4 up and down.

  When the hydraulic excavator 1 is operating as described above, air is introduced from the inlet 9E of the building cover 9 by the cooling fan 7A of the engine 7, and the air is used as cooling air to cool the radiator 12A and the oil cooler 12B of the heat exchanger 12. The fluid to be cooled can be cooled by supplying to the intercooler 12C. And the cooling air which passed through these flows out from the outflow port 9F through the circumference | surroundings of the engine 7, the hydraulic pump 8, etc.

  Here, foreign air such as pebbles and insects and dust are mixed in the cooling air flowing into the building cover 9 from the inlet 9E, but the heat exchange device 11 is connected to the front surface 12D side of the heat exchanger 12. Covered with a dustproof net 17. As a result, foreign matter such as pebbles and insects can be captured by the dust-proof net 17, and clogging and damage to the heat exchanger 12 can be prevented. However, since the fine dust mixed in the cooling air passes through the dust-proof net 17 and accumulates on the cooling fins of the heat exchanger 12, it is necessary to periodically perform a cleaning operation.

  Therefore, a procedure of a cleaning operation for removing dust adhered and deposited on the heat exchanger 12 (the radiator 12A, the oil cooler 12B, and the intercooler 12C) will be described.

  First, as shown in FIG. 1, the operator opens the left side plate 9 </ b> A of the building cover 9 from the ground, and removes the butterfly bolt 20 that fixes the divided nets 18 and 19 of the dustproof net 17. At this time, since the butterfly bolt 20 is disposed only below the divided nets 18 and 19, the operator does not go up to the upper swing body 3 and does not use a tool such as a spanner. It can be easily removed by simply reaching out.

  Next, when each butterfly bolt 20 is removed, the oil cooler 12B can be exposed by moving the left divided net 18 to the right as shown in FIG. On the other hand, the radiator 12A and the intercooler 12C can be exposed by moving the right divided net 19 to the left side. At this time, each of the divided nets 18 and 19 can be smoothly moved by the rail 14 only by lightly pushing in the moving direction by reaching out from the ground.

  Then, when the left cooler net 18 is moved to expose the oil cooler 12B, dust attached and deposited can be removed by blowing air or water to the oil cooler 12B. Further, by moving the right division net 19, the radiator 12A and the intercooler 12C can be cleaned in the same manner.

  Thus, according to the present embodiment, the dust-proof net 17 that covers the front surface 12D side of the heat exchanger 12 is formed from the left divided net 18 and the right divided net 19 that are divided in the left and right directions of the heat exchanger 11. The divided nets 18 and 19 are movable in the left and right directions. Therefore, when cleaning dust or the like adhering to the heat exchanger 12, the heat exchanger can be simply moved by moving the left divided net 18 and the right divided net 19 covering the heat exchanger 12 to the right and left. 12 can be exposed to the outside.

  As a result, since it is not necessary to attach and detach each of the divided nets 18 and 19, the heat exchanger 12 can be easily cleaned, and workability can be improved. In addition, since it is possible to prevent a situation in which the dustproof net 17 that has been removed by mistake is stepped on, the life and reliability can be improved.

  Further, the butterfly bolt 20 that fixes the divided nets 18 and 19 is disposed only below the divided nets 18 and 19. Accordingly, the operator can easily remove the butterfly bolt 20 by simply opening the left side plate 9A of the building cover 9 and reaching out without going up to the upper swing body 3. Moreover, the butterfly bolt 20 does not need to use a tool such as a spanner. As a result, the heat exchanger 12 can be cleaned even more easily.

  On the other hand, the divided nets 18 and 19 of the dust-proof net 17 are configured to move to the left and right within the range of the front surface 12D of the heat exchanger 12. Therefore, even if the divided nets 18 and 19 are moved, they protrude to the periphery. There is nothing. Thereby, the space for moving each division | segmentation net | network 18 and 19 can be abbreviate | omitted, the installation space of the heat exchange apparatus 11 can be made small, and the freedom degree of a layout can be raised.

  Further, since each of the divided nets 18 and 19 is configured so that the hooks 18C and 19C are hung on the rail 14 extending in the moving direction on the front surface 12D side of the heat exchanger 12, the divided nets 18 and 19 are arranged along the rail 14. And can move smoothly.

  In the embodiment, the dust-proof net 17 is divided into two in the left and right directions, and the left divided net 18 and the right divided net 19 that can move in the left and right directions are taken as an example. explained. However, the present invention is not limited to this. For example, as in the first modification shown in FIG. 10, the dustproof net 31 is divided into two parts in the upward and downward directions, and the upper part is movable in the same upward and downward directions. You may comprise by the division | segmentation net 32 and the lower division | segmentation net 33. FIG. In this case, each of the divided nets 32 and 33 may be configured to hold the left and right sides so as to be movable upward and downward by rails 34 having a C-shaped cross section.

  Further, as in the second modified example shown in FIG. 11, the dustproof net 41 is divided into three in the left and right directions, and the left divided net 42, the central divided net 43, which can move in the same left and right directions, You may comprise by the right division | segmentation net 44. In this case, two of the divided nets 42, 43, 44 can be moved to greatly expose the heat exchanger 12. In addition, this configuration can be similarly applied to the first modification.

  In the embodiment, the heat exchanger 12 has been described by taking as an example the case where the radiator 12A, the oil cooler 12B, and the intercooler 12C are arranged in parallel to the flow direction of the cooling air. However, the present invention is not limited to this. For example, in the case of the engine 7 that does not include a supercharger, the intercooler may be eliminated, and the heat exchanger may be configured by a radiator and an oil cooler. Moreover, it is good also as a structure arrange | positioned in series so that a radiator, an oil cooler, etc. may overlap with the flow direction of cooling air.

  Further, in the embodiment, the case where the engine 7 is provided with the cooling fan 7A has been described as an example. However, the present invention is not limited to this. For example, a cooling fan may be provided separately from the engine and driven to rotate using an electric motor, a hydraulic motor, or the like.

  Further, in the embodiment, the heat exchange device 11 of the crawler excavator 1 is described as an example as the heat exchange device of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a heat exchanging device for a hydraulic excavator provided with a wheel-type lower traveling body. Furthermore, the present invention can be widely applied to heat exchange devices for other construction machines such as hydraulic cranes, wheel loaders, tractors, and the like.

It is a front view which shows the hydraulic excavator provided with the heat exchange apparatus by embodiment of this invention. It is an expanded sectional view of the upper turning body seen from the direction of arrows II-II in FIG. It is an external appearance perspective view which expands and shows a heat exchange apparatus with the vertical board of a building cover. It is an external appearance perspective view which shows the heat exchange apparatus in the state which removed the dustproof net. It is an external appearance perspective view which shows an upper bracket and a rail. It is an external appearance perspective view which shows a lower bracket and a screw seat member. It is an external appearance perspective view shown in the state where the left division net and right division net of a dustproof net were separated. It is a principal part expansion perspective view which expands and shows the state which hooked the hook of each division | segmentation net | network on the rail. It is an external appearance perspective view which shows the heat exchange apparatus of the state which moved the left division | segmentation net | network of the dust-proof net and exposed the oil cooler. It is an external appearance perspective view which shows the heat exchange apparatus provided with the dust-proof net | network by the 1st modification of this invention. It is an external appearance perspective view which shows the heat exchange apparatus provided with the dust-proof net | network by the 2nd modification of this invention.

Explanation of symbols

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 3 Upper turning body 5 Turning frame 7 Engine 7A Cooling fan 11 Heat exchange apparatus 12 Heat exchanger 12A Radiator 12B Oil cooler 12C Intercooler 12D Front surface 14,34 Rail 17,31,41 Dust-proof net 18,42 Left division net 19,44 Right Divided net 32 Upper divided net 33 Lower divided net 43 Central divided net

Claims (3)

A heat exchanger that is attached to a frame constituting the construction machine and cools the fluid whose temperature has risen, and is located upstream of the cooling air supplied to the heat exchanger so as to cover the front surface of the heat exchanger In a heat exchange device for a construction machine comprising a dustproof net that captures foreign matter in the cooling air,
The dustproof net is composed of a plurality of divided nets divided in the left, right direction or up and down directions, and each divided net is configured to be movable in the left, right direction or up and down direction. And heat exchange equipment for construction machinery.   2. The heat exchange device for a construction machine according to claim 1, wherein each of the divided nets of the dustproof net is configured to move leftward, rightward, upward, or downward within a range of a front surface of the heat exchanger.   The heat of the construction machine according to claim 1 or 2, wherein a rail is provided on a front surface side of the heat exchanger so as to extend leftward, rightward, upward, or downward and guide each of the divided nets in a moving direction. Exchange equipment.

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