JP4792452B2 - Heat exchange equipment for construction machinery - Google Patents

Description

  The present invention relates to a heat exchange device for a construction machine, which is provided in a construction machine such as a hydraulic excavator and includes a dustproof net that covers the front side of a plurality of heat exchangers such as a radiator and an oil cooler.

  A construction machine such as a hydraulic excavator includes a traveling body, a revolving body disposed on the traveling body, and a working device including a boom, an arm, and the like that are provided on the revolving body so as to be rotatable in the vertical direction. A building cover is provided on the revolving structure, and in this building cover, there is a hydraulic pump that supplies hydraulic oil that drives a working device and the like, an engine that drives the hydraulic pump, and heat that is disposed near the engine. An exchange device or the like is accommodated.

  FIG. 7 is a perspective view showing an example of a conventional heat exchange device, and FIG. 8 is a plan view schematically showing an arrangement relationship between a heat exchanger and a dustproof net provided in the conventional heat exchange device shown in FIG. 9 is a perspective view showing a state in which the dustproof net is removed from the state shown in FIG.

  As shown in these drawings, the above-described heat exchanging device includes a fixed frame 30 erected on a revolving frame of a revolving structure, and a plurality of heats that are fixed by the fixed frame 30 and cool a fluid whose temperature has risen. An exchanger, for example, an intercooler 31 that cools air compressed by a supercharging device, a radiator 32 that cools engine coolant, an oil cooler 33 that cools hydraulic oil, and a heat exchanger disposed on the front side of the heat exchanger. Dust-proof nets 34 and 34A for catching foreign matter in the cooling air generated by the fan are provided. Each of the dustproof nets 34, 34 </ b> A is formed in a straight line shape in plan view, and is arranged so as to be connected to each other so that the plan view becomes a single straight line.

Further, as shown in FIG. 8, for example, an intercooler 31 is arranged upstream of the radiator 32 with respect to the flow of cooling air, and an oil cooler 33 is arranged in the lateral direction of the radiator 32. As this type of prior art, for example, there is one disclosed in Patent Document 1.
JP 2006-242077 A

  In general, when the hydraulic excavator is a small turning excavator or the like, a heat exchanger such as an engine, an intercooler 31, a radiator 32, and an oil cooler 33 is mounted in order to improve workability in a narrow space. It is important to make the revolving structure compact. In addition, since devices such as a battery and an air cleaner are arranged in the immediate vicinity of the front surface side of the heat exchange device including the dust nets 34 and 34A, it is necessary to secure an arrangement space for these devices and a maintenance space. Become.

  7 to 9 described above, as shown in FIG. 8, in the lateral direction of the intercooler 31 and in front of the oil cooler 33, the dustproof net 34A, the fixed frame 30, the intercooler 31, and the oil A space portion 35 having a substantially rectangular shape in plan view surrounded by the cooler 33 exists. Conventionally, the space portion 35 is a dead space and has not been effectively utilized as a space for arranging peripheral devices of the heat exchange device and a space for maintenance.

  The present invention has been made from the above-described actual state of the prior art, and an object thereof is to provide a heat exchange device for a construction machine that can reduce a dead space around a plurality of arranged heat exchangers. .

In order to achieve this object, a heat exchange device for a construction machine according to the present invention is fixed to a fixed frame attached to a frame of the construction machine, and is connected to the first heat exchanger and the first heat exchanger. A plurality of heat exchangers for cooling the fluid whose temperature has risen, and cooling supplied to these heat exchangers, including a second heat exchanger disposed upstream of the cooling air flow generated by the cooling fan In the heat exchange apparatus for a construction machine, which is located upstream of the wind, covers the front side of these heat exchangers, and has a dust-proof net that captures foreign matter in the cooling wind, the dust-proof net is a single dust-proof net. The upper holding frame is integrally provided at the upper edge portion, the lower holding frame is integrally provided at the lower edge portion, and the dust-proof net includes the second heat exchanger and the first heat. Formed on the front of the exchanger It is arranged so as to follow the step shape, and the whole is provided in a Z-shape in plan view.

In the present invention configured as described above, a plurality of heat exchangers and dustproof nets can be arranged because a Z-shaped dustproof net in plan view along a step shape formed on the front side of a plurality of heat exchangers can be disposed. Can be made smaller, and the dead space around these heat exchangers can be made smaller. In addition, the present invention is easy to manufacture because it is only necessary to fold one dustproof net and form it in a Z shape in plan view .

The heat exchange system for a construction machine of the present invention is fixed to a fixed frame attached to the frame of the construction machine, it is caused by the cooling fan to the first heat exchanger and the first heat exchanger A second heat exchanger disposed upstream of the cooling air flow, and a plurality of heat exchangers for cooling the fluid whose temperature has risen, and located upstream of the cooling air supplied to these heat exchangers In the heat exchanging device of the construction machine, which covers the front side of these heat exchangers and has a dustproof net that captures foreign matter in the cooling air, the dustproof net includes an L-shaped dustproof net and a plane A front-side position of the first heat exchanger at the side end of the second heat exchanger in the frame is combined with a dustproof net that is linear in view and provided in a Z-shape in plan view. Is different from the above fixed frame A fixed frame is provided, and the bent portion of the L-shaped dustproof net in plan view is disposed so as to face the other fixed frame, and the L-shaped dustproof net in plan view and the dustproof linear in plan view are arranged. A net is disposed in front of the first and second heat exchangers, and is provided so as to follow a step shape formed on the front surfaces of the second heat exchanger and the first heat exchanger. It is said. In the present invention configured as described above, since the dustproof net is divided into two parts, the shape of each divided dustproof net is small, the weight is light and easy to handle, and the heat exchanger can be easily attached to and detached from the front side. Become .

The heat exchange system for a construction machine of the present invention is fixed to a fixed frame attached to the frame of the construction machine, it is caused by the cooling fan to the first heat exchanger and the first heat exchanger A second heat exchanger disposed upstream of the cooling air flow, and a plurality of heat exchangers for cooling the fluid whose temperature has risen, and located upstream of the cooling air supplied to these heat exchangers In addition, in the heat exchange device for a construction machine, which covers the front side of these heat exchangers and has a dustproof net that captures foreign matter in the cooling air, the dustproof net is at least three linear dustproof nets in plan view. And the whole is provided in a Z-shape in plan view, and at the position of the front side of the first heat exchanger at the side end of the second heat exchanger in the frame, the fixed frame and Is different first fixed frame And a second fixing different from the fixed frame at a position upstream of the cooling air flow and on the side end side of the second heat exchanger so as to face the first fixed frame. A frame is provided, and one of the dust-proof nets in a straight line in plan view is provided with one dust-proof net facing one end of the fixed frame and the other end facing the first fixed frame. The net is provided so that one end faces the first fixed frame and the other end faces the second fixed frame, and the three dustproof nets have one end opposed to the second fixed frame, The other end is provided to face the fixed frame, and the three dustproof nets are provided so as to follow a step shape formed on the front surface of the second heat exchanger and the first heat exchanger. It is characterized by that. In the present invention configured as described above, since the dustproof net is divided into three or more parts, the shape of each divided dustproof net is small, the weight is light and easy to handle, and the heat exchanger can be attached to and detached from the front side. It becomes easy.

The present invention covers the front side of the heat exchanger to be more disposed, a dust protective net to capture the foreign matter in the cooling air, since the whole is provided so as to be viewed Z-shape, the heat exchanger of the multiple The gap formed between the heat exchanger and the dust-proof net can be reduced, and the dead space around these heat exchangers can be reduced as compared with the conventional case. Thereby, the circumference | surroundings of a heat exchange apparatus can be effectively utilized as an arrangement space of the apparatus arrange | positioned in the vicinity of this heat exchange apparatus, and as a maintenance space.

  Hereinafter, the best mode for carrying out a heat exchange device for a construction machine according to the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing a small swivel excavator cited as an example of a construction machine provided with the first embodiment of the heat exchange device of the present invention.

  The construction machine provided with the first embodiment of the heat exchange device according to the present invention is, for example, a small turning type hydraulic excavator as shown in FIG. 1, and a traveling body 1 and a turning body disposed on the traveling body 1. 2 and a working device 5 attached to the swivel body 2 so as to be movable in the vertical direction. A cab 3 and a building cover 4 are provided on the swivel frame 2A of the swivel body 2. In the building cover 4, a hydraulic pump that supplies hydraulic oil that drives the working device 5 and the like, and this hydraulic pump is driven. In addition to the engine, a heat exchange device and the like disposed in the vicinity of the engine are accommodated.

  The work device 5 includes a boom 6 attached to the revolving body 2 so as to be rotatable in the vertical direction, an arm 7 attached to the tip of the boom 6, and a bucket 8 attached to the tip of the arm 7. A boom cylinder 9 that drives the boom 6, an arm cylinder 10 that drives the arm 7, and a bucket cylinder 11 that drives the bucket 8 are included. Excavation work or the like can be performed by driving the actuator 5 or the like.

  FIG. 2 is a perspective view showing the first embodiment of the present invention, and FIG. 3 is a plan view schematically showing the arrangement relationship between the heat exchanger and the dustproof net provided in the first embodiment of the present invention.

As shown in FIG. 2, the heat exchange device according to the first embodiment includes a fixed frame 12 erected on the swivel frame 2 </ b> A of the swivel body 2, and fluids that are respectively fixed by the fixed frame 12 and have increased in temperature. A plurality of heat exchangers that cool the engine, that is, an intercooler (second heat exchanger) 13 that cools the air compressed by the supercharging device, a radiator 14 that cools the cooling water of the engine, and the hydraulic oil An oil cooler (first heat exchanger) 15 is provided. As shown in FIG. 3, an intercooler 13 is arranged upstream of the radiator 14 with respect to a flow of cooling air generated by a cooling fan (not shown), and an oil cooler 15 is arranged side by side in the lateral direction of the radiator 14. is there.

In the first embodiment, a dust-proof net 16 that covers the front side of the heat exchanger described above and captures foreign matter in the cooling air is provided so as to be Z-shaped as a whole in plan view. This dustproof net 16 is provided by bending one dustproof net. An upper holding frame 17 that holds the dust-proof net 16 is integrally provided at the upper edge of the dust-proof net 16, and a lower holding frame 18 that holds the dust-proof net 16 is provided at the lower edge of the dust-proof net 16. Are provided integrally. The upper holding frame 17 and the lower holding frame 18 are also provided so as to have a Z-shape in plan view.

  As shown in FIG. 3, the dust-proof net 16 is arranged along the front side of the intercooler 13 and the oil cooler 15, that is, along the step shape formed between the intercooler 13 and the oil cooler 15. ing.

  A lower holding frame 18 that holds the lower edge of the dust-proof net 16 is inserted into a lower portion on the front side of the fixed frame 12, and a holding bracket 19 having a shape opened upward is attached.

  When attaching the dust proof net 16, the dust proof net 16 is lowered vertically at the front position of the fixed frame 12, and a lower holding frame 18 that holds the lower edge of the dust proof net 16 is inserted into the holding metal fitting 19. In this state, the upper holding frame 17 that holds the upper edge portion of the dustproof net 16 is fastened to the front upper portion of the fixed frame 12 by the butterfly bolt 20. When removing the dustproof net 16, contrary to the above, after the butterfly bolt 20 is removed, the dustproof net 16 is pulled up vertically. That is, the attaching / detaching operation of the dustproof net 16 is performed in an extremely small attaching / detaching space.

  In the heat exchanging device according to the first embodiment having the above-described configuration, when cooling air is generated by a cooling fan (not shown) that rotates as the engine is driven (not shown), foreign matter in the cooling air is captured by the dust-proof net 16. . Therefore, clean cooling air from which foreign matter has been removed is supplied to the intercooler 13, the radiator 14, and the oil cooler 15. The intercooler 13 cools the air compressed by a supercharging device (not shown) by the cooling air supplied in this way, the radiator 14 cools the engine coolant, and the oil cooler 15 cools the hydraulic oil.

According to the heat exchange device according to the first embodiment, the steps formed on the front surfaces of the intercooler (second heat exchanger) 13 and the oil cooler (first heat exchanger) 15 of the heat exchanger. Since the dust-proof net 16 having a Z-shape in plan view can be arranged along the shape, the gap formed between the intercooler 13 and the oil cooler 15 and the dust-proof net 16 can be reduced. 13, the dead space around the radiator 14 and the oil cooler 15 can be reduced. Thereby, the circumference | surroundings of the heat exchange apparatus which concerns on this 1st Embodiment can be utilized effectively as arrangement | positioning space of apparatuses, such as a battery and an air cleaner arrange | positioned in the vicinity of this heat exchange apparatus, and as a maintenance space. .

  Further, the dust-proof net 16 is easy to manufacture because it is only necessary to bend a single dust-proof net and form a Z-shape in plan view.

  FIG. 4 is a plan view schematically showing the arrangement relationship between the heat exchanger and the dustproof net provided in the second embodiment of the present invention.

In the second embodiment shown in FIG. 4, an intercooler (second heat exchanger) 13 is illustrated on the left end side of the radiator 14, the front side of the radiator 14 is illustrated on the left end, and an oil cooler (first heat exchanger) 15 is illustrated. A fixed frame (another fixed frame) 12A is erected at a position on the front side at the right end. Further, the dustproof net is provided so that the dustproof net 16A1 having a linear shape in plan view and the dustproof net 16A2 having an L shape in plan view are combined so as to be Z-shaped as a whole. The dust-proof net 16A1 having an L shape in plan view is located on the front side of the oil cooler 15, and is disposed so that the bent portion faces the fixed frame 12A. The other two dustproof nets 16 </ b> A <b> 2 are arranged on the front side of the intercooler 13. That is, the dustproof net 16A2 is disposed along the intercooler 13 and the dustproof net 16A1 is disposed along the oil cooler 15. Other configurations are the same as those of the first embodiment described above.

  The second embodiment configured as described above is also formed in a Z-shape in plan view by the dust-proof net 16A1 and the dust-proof net 16A2, and the intercooler 13 and the oil cooler 15 are arranged along the Z-shape in plan view. Therefore, each of the gap formed between the intercooler 13 and the dustproof net 16A2 and the gap formed between the oil cooler 15 and the dustproof net 16A1 can be reduced. Similarly to the embodiment, the dead space around the intercooler 13, the radiator 14, and the oil cooler 15 can be reduced, so that the periphery of the heat exchange device according to the second embodiment can be brought close to the heat exchange device. It can be effectively utilized as an arrangement space for the equipment to be arranged and as a maintenance space.

  Further, since the dust-proof net is divided into the dust-proof net 16A1 and the dust-proof net 16A2, the shape of each of the divided dust-proof nets 16A1, 16A2 is small, the weight is light and easy to handle, the intercooler 13 and the oil cooler 15 can be easily attached to and detached from the front side.

  FIG. 5 is a plan view schematically showing the arrangement relationship between the heat exchanger and the dustproof net provided in the third embodiment of the present invention.

In the third embodiment shown in FIG. 5, the intercooler (second heat exchanger) 13 is illustrated on the left end side in the drawing, the front side of the radiator 14 in the illustrated left end and the oil cooler (first heat exchanger) 15 is illustrated. A fixed frame 12B1 is erected at a position on the front side of the right end, and is positioned upstream of the cooling air and on the left end side of the intercooler 13 so as to face this fixed frame (first fixed frame) 12B1. The fixed frame (second fixed frame) 12B2 is erected. Further, the dust-proof net is arranged on the front side of the oil cooler 15 so that one end faces the fixed frame 12 on the left side of the figure and the other end faces the fixed frame 12B1 (one dust-proof net). ) 16B1 and a dustproof net (second dustproof net) 16B2 arranged so that one end faces the fixed frame 12B1 and the other end faces the fixed frame 12B2, and one end faces the fixed frame 12B2 In addition, a dustproof net (third dustproof net) 16B3 arranged so that the other end faces the fixed frame 12 on the right side of the figure is combined, and the whole is provided in a Z-shape in plan view.

  That is, the dust-proof net 16B3 is positioned along the intercooler 13, and the dust-proof net 16B1 is positioned along the oil cooler 15. Other configurations are the same as those of the first and second embodiments described above.

  Also in the third embodiment configured as described above, the dustproof net 16B1, the dustproof net 16B2 and the dustproof net 16B3 are entirely formed in a Z-shape in plan view, and the dustproof net 16B1 and the dustproof net 16B3 are made to be oil coolers. 15 and the intercooler 13 are arranged so that the same operational effects as in the second embodiment can be obtained. In addition, since the dustproof net is divided into three parts into the dustproof net 16B1, the dustproof net 16B2 and the dustproof net 16B3, the shape of the divided dustproof nets 16B1, 16B2, and 16B3 can be made smaller than in the second embodiment. The attachment / detachment work of the dustproof net to the front side of the intercooler 13 and the oil cooler 15 is further facilitated.

FIG. 6 is a plan view schematically showing the arrangement relationship between the heat exchanger and the dust-proof net provided in the reference example previously devised by the present inventors.

In the reference example shown in FIG. 6, a fixed frame 12 </ b> C shaped like “<” in a plan view is erected on the front side of the oil cooler 15 at the left end of the intercooler 13 in the figure, and a dustproof net 16 </ b> C is provided. For example, a single dustproof net is bent in a “<” shape in plan view along the fixed frame 12 </ b> C. Other configurations are the same as those of the first to third embodiments described above.

In the reference example configured as described above, the space portion located on the front side of the oil cooler 15 can be formed in a space portion in which the plan view is substantially triangular. Thereby, the dead space around the intercooler 13, the radiator 14, and the oil cooler 15 can be reduced, and the installation of the devices arranged around the heat exchange device according to this reference example in the vicinity of the heat exchange device It can be used effectively as a space and as a maintenance space. Further, the dust-proof net 16C is easy to manufacture because it is only necessary to bend a single dust-proof net and form it in the shape of a "<" in plan view.

In addition, a part of each of the dustproof net 16 in the first embodiment, the dustproof nets 16A1 and 16A2 in the second embodiment, the dustproof nets 16B1, 16B2, and 16B3 in the third embodiment, and the dustproof net 16C in the reference example . Alternatively, the configuration may be divided as necessary.

It is a side view which shows the small turning type | mold hydraulic shovel mentioned as an example of the construction machine with which 1st Embodiment of the heat exchange apparatus of this invention is provided. 1 is a perspective view showing a first embodiment of the present invention. It is the top view which showed typically the arrangement | positioning relationship between the heat exchanger with which a 1st Embodiment of this invention is equipped, and a dustproof net. It is the top view which showed typically the arrangement | positioning relationship between the heat exchanger with which a 2nd Embodiment of this invention is equipped, and a dustproof net. It is the top view which showed typically the arrangement | positioning relationship between the heat exchanger with which a 3rd Embodiment of this invention is equipped, and a dustproof net. It is the top view which showed typically the arrangement | positioning relationship of the heat exchanger with which a reference example devised previously by the present inventors and a dustproof net. It is a perspective view which shows an example of the conventional heat exchange apparatus. It is the top view which showed typically the arrangement | positioning relationship between the heat exchanger with which the conventional heat exchange apparatus shown in FIG. 7 is equipped, and a dustproof net. It is a perspective view which shows the state which removed the dustproof net from the state shown in FIG.

2 Revolving body 2A Revolving frame 4 Building cover 12 Fixed frame 12A Fixed frame (another fixed frame)
12B1 fixed frame (first fixed frame)
12B2 fixed frame (second fixed frame)
13 intercooler (second heat exchanger)
14 Radiator 15 Oil cooler (first heat exchanger)
16 Dustproof net 16A1 Dustproof net (one dustproof net)
16A2 dustproof net (second dustproof net)
16B1 dustproof net (three dustproof nets)
16B2 Dustproof net 16B3 Dustproof net 16C Dustproof net 17 Upper holding frame 18 Lower holding frame 19 Holding bracket 20 Butterfly bolt

Claims (3)

A second fixed to a fixed frame attached to the frame of the construction machine and disposed upstream of the first heat exchanger and the cooling air flow generated by the cooling fan with respect to the first heat exchanger. and a heat exchanger, a plurality of heat exchanger for cooling the fluid which has a temperature rise, is located on the upstream side of the cooling air supplied to the heat exchangers, it covers the front side of the heat exchanger, In a heat exchange device for a construction machine equipped with a dustproof net that captures foreign matter in the cooling air,
The dustproof net is formed by bending a single dustproof net, and an upper holding frame is integrally provided at the upper edge portion, and a lower holding frame is integrally provided at the lower edge portion,
The dust-proof net is arranged so as to follow a step shape formed on the front surfaces of the second heat exchanger and the first heat exchanger, and the whole is provided in a Z-shape in plan view. Heat exchange equipment for construction machinery. A second fixed to a fixed frame attached to the frame of the construction machine and disposed upstream of the first heat exchanger and the cooling air flow generated by the cooling fan with respect to the first heat exchanger. A plurality of heat exchangers including a heat exchanger for cooling the fluid whose temperature has risen, and located upstream of the cooling air supplied to these heat exchangers, covering the front side of these heat exchangers, In a heat exchange device for a construction machine equipped with a dustproof net that captures foreign matter in the cooling air ,
The dust-proof net is formed by combining a dust-proof net having an L-shape in plan view and a dust-proof net having a linear shape in plan view, and is provided in a Z-shape in plan view. A separate fixed frame different from the fixed frame is provided at a position on the front side of the first heat exchanger at the side end, and the bent portion of the L-shaped dustproof net in plan view is fixed to the fixed position. The dust-proof net having the L shape in plan view and the dust-proof net having the linear shape in plan view are arranged on the front surfaces of the first and second heat exchangers while being arranged so as to face the frame. A heat exchanging device for a construction machine, characterized in that the heat exchanging device is provided along a step shape formed on the front surface of the heat exchanger and the first heat exchanger. A second fixed to a fixed frame attached to the frame of the construction machine and disposed upstream of the first heat exchanger and the cooling air flow generated by the cooling fan with respect to the first heat exchanger. A plurality of heat exchangers including a heat exchanger for cooling the fluid whose temperature has risen, and located upstream of the cooling air supplied to these heat exchangers, covering the front side of these heat exchangers, In a heat exchange device for a construction machine equipped with a dustproof net that captures foreign matter in the cooling air ,
The dustproof net is formed by combining at least three dustproof nets in a straight line in plan view and is provided in a Z-shape in plan view, and at the side end of the second heat exchanger in the frame, A first fixed frame different from the fixed frame is provided at a position on the front surface side of the heat exchanger, and is located upstream of the cooling air flow so as to face the first fixed frame and the first fixed frame. A second fixed frame different from the fixed frame is further provided at a position on the side end portion side of the heat exchanger of No. 2,
Among the dustproof nets in a straight line in plan view, one dustproof net is provided such that one end faces the fixed frame and the other end faces the first fixed frame, and the second dustproof net has one end Is provided so as to face the first fixed frame and the other end faces the second fixed frame, and the three dustproof nets have one end opposed to the second fixed frame and the other end It is provided so as to face the fixed frame, and the three dustproof nets are provided so as to follow a step shape formed on the front surfaces of the second heat exchanger and the first heat exchanger. Heat exchange equipment for construction machinery.

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