JP4467552B2 - Construction machine cooling system - Google Patents

Description

  The present invention relates to a cooling device for a construction machine.

  A construction machine must have a radiator for radiating the cooling water of the engine and an oil cooler for radiating the hydraulic fluid of the hydraulic equipment. Further, in recent years, an aftercooler for cooling the compressed supercharged air has been adopted in order to increase the intake air efficiency of the engine and improve the engine performance. And several techniques for arranging these cooling devices in consideration of improving the cooling efficiency and considering the maintainability and the compactness of the installation space have been proposed.

  For example, there is a construction machine cooling device disclosed in Japanese Patent Application Laid-Open No. 11-350530 as a first example. FIG. 7 is a layout diagram of the cooling device described in the publication. In FIG. 7, a radiator 33 is disposed in front of a fan 32 driven by an engine 31 in the cooling device 30, and an oil cooler 34 and an intercooler 35 are juxtaposed in front of the radiator 33, so that the thickness in the ventilation direction is substantially uniform. The ventilation area and thickness of the oil cooler 34 are determined so that The air conditioner capacitor 36 is placed in front of the intercooler 35.

  Further, as a second example, there is an automobile cooling device disclosed in, for example, Japanese Utility Model Publication No. 62-175218, and FIG. 8 is a partial sectional view of a front view of the cooling device described in the publication. In FIG. 8, an upper tank 41 and a lower tank 42 are provided above and below the cooling device 40, respectively. The upper tank 41 and the lower tank 42 are divided into two upper and lower tanks 45 by partition plates 43 and 44, respectively. , 46 and lower tanks 47, 48. The upper tank 45 and the lower tank 47 are connected by a heat radiating tube 49 to form a radiator 50, and the upper tank 46 and the lower tank 48 are connected by a heat radiating tube 51 to form an intercooler 52. Side supports 53, 53 are fixed to both sides of the cooling device 40 in which the radiator 50 and the intercooler 52 are integrated, and the cooling device 40 is attached to a vehicle body frame (not shown) via the side supports 53, 53. As described above, the radiator 50 and the intercooler 52 are disposed so that the front surfaces thereof are substantially flush with each other, thereby improving the cooling efficiency of the radiator 50 and reducing the size of the cooling device 40.

  As a third example, there is a cooling device shown in FIG. In FIG. 9, a radiator 63 is disposed in front of a fan 62 driven by an engine 61. The oil cooler 64 is disposed in front of the radiator 63, a lower end portion thereof is pivotally supported by a pin 65, and is attached to the radiator 63 with a bolt 66 at a side surface portion. Then, by loosening the bolt 66, the oil cooler 64 can tilt forward about the pin 65 to the position of the two-dot chain line shown in the figure. Thus, the oil cooler 64 is tilted to widen the opening width C between the radiator 63 and the radiator 63 and the oil cooler 64 are easily cleaned.

  However, the above prior art has the following problems. In the first example, since the oil cooler 34 and the intercooler 35 are juxtaposed on the front surface of the radiator 33, the oil cooler 34 and the intercooler 35 must be removed when cleaning dust and dirt adhering to the front surface of the radiator 33. Therefore, the work is troublesome and takes time. In the second example, since the radiator 50 and the intercooler 52 are integrated, even if only one of them is to be removed from the frame for maintenance, both must be removed, resulting in waste. Furthermore, in the third example, since the oil cooler 64 can tilt forward, the upper part of the front surface of the radiator 63 can be cleaned, but it is difficult to sufficiently clean the lower part of the front surface because a cleaning tool is difficult to enter. Moreover, it can be improved by increasing the amount of tilting, but it is difficult to increase it due to restrictions on the space of the vehicle body.

  The present invention focuses on the above-described conventional problems, and an object thereof is to provide a construction machine cooling apparatus that can easily perform maintenance such as cleaning, inspection, and repair of each cooling device such as a radiator, an oil cooler, and an aftercooler. Is.

In order to achieve the above object, a cooling device for a construction machine according to the present invention comprises:
The frame (1) is composed of left and right frames standing on the body frame, and forms an opening (1a) on the ventilation path on the upstream side of the fan (26).
Opening of the frame (1) radiator (1a) (11A) and with arranging the oil cooler (12) after cooler (13) in parallel, said radiator (11A) and after cooler (13) said frame (1) Configured to be removable from
Is fixed to the fan shroud (19) to the right and left frame of the frame (1), wherein the lower tank of the radiator (11A) and after cooler (13), toward the rear surface of the lower tank to said fan shroud (19) side Protruding outlet pipes (11d, 13d) are provided next to each other ,
The bracket (20) attached to the upper surface of the fan shroud (19) and the lower part of the fan shroud (19) are disposed above the outlet pipes (11d, 13d) of the radiator (11A) and the aftercooler (13). located and deposited by brackets (21), the radiator (11A) and the radiator at the bottom of the aftercooler both brackets when removing (13) the upper (20) (21) (11A) and aftercooler (13 The outlet pipes (11d, 13d) are configured to be removable from the fan shroud (19) so that the brackets (20) (21) do not interfere with the fan shroud (19). is there.

In the present invention, the outlet pipe (11d, 13d) of the radiator (11A) and the aftercooler (13) is configured to cut a part of the fan shroud (19) and pass through the cut part.
The bracket (21) attached to the lower part of the fan shroud (19) is preferably arranged so as to close the cut portion obtained by cutting a part of the fan shroud (19).

According to the present invention, the frame that forms the opening on the ventilation path is provided on the upstream side of the fan, and the radiator, the oil cooler, and the aftercooler are arranged in parallel in the opening of the frame. Since there is no cooling device, it is possible to remove each cooling device alone without removing other cooling devices. In addition, the ventilation resistance of each cooling device can be reduced to increase the amount of ventilation, and the temperature of the cooling air on the upstream side of each cooling device is lowered, so that the cooling efficiency is improved. Further, since the radiator and the aftercooler are detachably attached, they can be easily removed. Therefore, maintenance such as cleaning and inspection can be easily performed.

  Next, specific embodiments of the construction machine cooling apparatus according to the present invention will be described with reference to the drawings.

  Hereinafter, an embodiment of a cooling device for a construction machine according to the present invention will be described with reference to FIGS. First, a first embodiment will be described with reference to FIGS. 1 is a front view of the cooling device of the first embodiment, FIG. 2 is a Z view of FIG. 1, and FIG. 3 is a Y view of FIG. 4 is an X view of FIG. 2, and FIG. 5 is a perspective view of the fan shroud. As shown in FIGS. 1 to 4, in the cooling device 10 of the present embodiment, the frame 1 that forms the opening 1 a on the upstream side of the fan 26 attached to the engine 25 and on the ventilation path of the fan 26. In the opening 1a of the frame 1, a radiator 11, an oil cooler 12, and an aftercooler 13 are arranged in parallel with their front surfaces positioned on substantially the same plane.

  The frame 1 includes left and right frames 2 and 3 erected on the vehicle body frame 27, and upper and lower brackets 4 and 5 that connect the left and right frames 2 and 3 at the top and bottom, respectively. The left and right frames 2 and 3 and the upper and lower brackets 4 and 5 form the opening 1a at the center. That is, the left and right frames 2 and 3 are provided with bottom plates 2a and 3a substantially horizontally at the bottom, and U-shaped vertical plates 2b and 3b are erected on the upper surfaces of the bottom plates 2a and 3a, respectively. The upper and lower brackets 4 and 5 are attached by bolts 7 to the front surfaces of the vertical plates 2b and 3b of the left and right frames 2 and 3, respectively. The lower bracket 5 is provided with a plate 5a substantially horizontally, and four receiving bosses 5b for supporting the radiator 11 and the aftercooler 13 are provided on the upper surface of the plate 5a. The lower end of the rear end side of the plate 5a is fixed to the bracket 6 attached by bolts 8 and 8 inside the vertical plates 2b and 3b of the left and right frames 2 and 3 by bolts 7 and 7. Yes.

  The radiator 11 has an upper tank 11c and a lower tank 11a at the top and bottom, and two feet 11b and 11b provided on the lower surface of the lower tank 11a are attached to receiving bosses 5b and 5b of the plate 5a of the lower bracket 5. It is attached to the frame 1 by inserting and fixing the upper tank 11c to the upper bracket 4 with bolts 7a. Similarly, the aftercooler 13 has an upper tank 13c and a lower tank 13a, and two feet 13b and 13b provided on the lower surface of the lower tank 13a are inserted into the receiving bosses 5b and 5b of the lower bracket 5. In addition, the upper tank 13c is fixed to the upper bracket 4 by bolts 7b and is attached to the frame 1.

  Cushions 14 and 15 are inserted between the lower surface of the lower tank 11a of the radiator 11, the lower surface of the lower tank 13a of the aftercooler 13, and the plate 5a of the lower bracket 5, respectively.

  The oil cooler 12 is attached to the frame 1 by fixing the front part to the upper and lower brackets 4 and 5 and the side part to the inner side surface of the vertical plate 3b of the right frame 3 by bolts 7c and 9, respectively. Further, dust-proof nets 16 (for the radiator 11 and the aftercooler 13) and 17 (for the oil cooler 12) are provided in front of the front surfaces of the radiator 11, the oil cooler 12, and the aftercooler 13, respectively. The dust-proof nets 16 and 17 are dropped from above using the grooves 2d and 3d provided on the plates 2c and 3c extending from the outer surfaces of the vertical plates 2b and 3b of the left and right frames 2 and 3, respectively. The plates 2c and 3c are fixed with butterfly bolts 18.

  On the other hand, the fan shroud 19 is fixed to the rear surfaces of the vertical plates 2b and 3b of the left and right frames 2 and 3 by bolts 7d. An L-shaped bracket 20 is fixed to the upper surface of the fan shroud 19 with bolts 9 a, and the gaps between the rear surfaces of the upper tanks 11 c, 12 c and 13 c of the radiator 11, the oil cooler 12 and the aftercooler 13 and the upper surface of the fan shroud 19 are packed. (Not shown). The lower part of the fan shroud 19 is bent in an L shape, and the gaps between the radiator 11, the oil cooler 12, and the rear surfaces of the lower tanks 11a, 12a, and 13a of the aftercooler 13 are sealed with packing (not shown). 4 and 5, a part of the L-shaped portion of the lower tank 11a of the radiator 11 and the lower tank 13a of the aftercooler 13 are partially cut off. A bracket 21 that closes the cut portion is fixed to the rear surface of the fan shroud 19 by bolts 9b.

  Next, operations and effects of the first embodiment will be described with reference to FIGS. When performing maintenance such as cleaning and inspection of the front surface of the radiator 11, the oil cooler 12, and the aftercooler 13, first, the butterfly bolt 18 is removed, and the dustproof nets 16 and 17 are pulled upward. Then, since all the front surfaces of the radiator 11, the oil cooler 12, and the aftercooler 13 are exposed and there is sufficient space in front of them, maintenance can be easily performed. When performing maintenance such as cleaning or checking only the oil cooler 12, only the dust-proof net 17 needs to be removed.

  When removing the radiator 11 or the aftercooler 13 from the frame 1, the bolts 9 a and 9 b are first removed, and the bracket 20 and the bracket 21 are removed from the upper surface and the lower portion of the fan shroud 19. Next, the bolts 7a and 7b that fix the upper tank 11c of the radiator 11 and the upper tank 13c of the aftercooler 13 to the upper bracket 4 are removed. Then, each of the radiator 11 and the aftercooler 13 can be lifted upward without the interference of the outlet pipe 11d of the lower tank 11a or the outlet pipe 13d of the lower tank 13a with the fan shroud 19, thereby easily Can be removed. When removing the oil cooler 12 from the frame 1, the bolts 7c and 9 fixed to the upper and lower brackets 4 and 5 and the vertical plate 3b of the right frame 3 at the front and side portions of the oil cooler 12, respectively. When removed, the oil cooler 12 can be lifted upward and can be easily removed from the frame 1.

  In this way, the radiator 11, the oil cooler 12, and the aftercooler 13 can be removed from the frame 1 independently without removing other cooling devices and the fan shroud 19, so that maintenance can be easily performed.

  Further, by arranging the radiator 11, the oil cooler 12, and the aftercooler 13 in parallel, all the dust and dust that have passed through each cooling device are accumulated inside the fan shroud 19. Therefore, by removing only the bracket 21 attached to the lower part of the fan shroud 19, a part of the inside of the fan shroud 19 is opened, so that dust and dust accumulated in the fan shroud 19 can be easily discharged. Can do.

  Furthermore, since the radiator 11, the oil cooler 12, and the aftercooler 13 are arranged in parallel, the ventilation path of each cooling device does not overlap, so that each ventilation resistance is reduced and the ventilation volume is increased, and also passes through each cooling device. The cooling efficiency is improved because the temperature of the cooling air is reduced.

  Next, a second embodiment will be described with reference to FIG. FIG. 6 is a front view of the cooling device of the second embodiment. The cooling device 10A of the second embodiment is obtained by removing the radiator 11 and the aftercooler 13 and attaching the radiator 11A in the first embodiment. As shown in FIG. 6, in the radiator 11A, three feet 11b provided on the lower surface of the lower tank 11e are inserted into the receiving bosses 5b of the lower bracket 5, and the upper tank 11f is fixed to the upper bracket 4 with bolts 7. By doing so, it is attached to the frame 1.

  Therefore, the operation and effect of the second embodiment are exactly the same as those of the first embodiment, but are suitable for an engine that does not require an aftercooler.

  As described above, the present invention has the following effects. A frame that forms an opening on the ventilation path of the fan is provided, and a radiator and an oil cooler, or a radiator, an oil cooler, and an aftercooler are arranged in parallel in the opening of the frame. There is no equipment, so each can be removed independently without removing other cooling equipment, and maintenance such as cleaning and inspection can be easily performed. Moreover, since at least any one of the cooling devices is detachably attached, the maintenance can be easily performed by removing. Further, since the fan shroud is attached to the frame, each cooling device can be attached and detached without removing the fan shroud, so that maintenance can be easily performed. In addition, since a part of the fan shroud is removable, each cooling device can be easily attached and detached by removing this part of the fan shroud, and dust and dust collected in the fan shroud can be easily discharged. it can.

The front view of the cooling device of a 1st embodiment of the present invention. Z view of FIG. Y view of FIG. X view of FIG. Fan shroud perspective view Front view of the cooling device of the second embodiment The figure which shows the 1st example of the conventional cooling device The figure which shows the 2nd example of the conventional cooling device The figure which shows the 3rd example of the conventional cooling device

Explanation of symbols

1 Frame 1a Opening part 2, 3 Left, right frame 2a, 3a Bottom plate 2b, 3b Vertical plate 2c, 3c Plate 2d, 3d Grooves 4, 5 Lower bracket 5a Plate 5b Boss 6 Brackets 7, 7a, 7b, 7c, 7d, 8, 9, 9a, 9b Bolt 10, 10A Cooling device 11, 11A Radiator 11a, 11e Lower tank 11b Foot 11c, 11f Upper tank 11d Outlet pipe 12 Oil cooler 13 After cooler 13a Lower tank 13b Foot 13c Upper tank 13d Outlet pipe 14, 15 Cushion 16, 17 Dust-proof net 18 Butterfly bolt 19 Fan shroud 20, 21 Bracket 25 Engine 26 Fan 27 Body frame

Claims (2)

In the cooling equipment for construction machinery,
The frame (1) is composed of left and right frames standing on the body frame, and forms an opening (1a) on the ventilation path on the upstream side of the fan (26).
Opening of the frame (1) radiator (1a) (11A) and with arranging the oil cooler (12) after cooler (13) in parallel, said radiator (11A) and after cooler (13) said frame (1) Configured to be removable from
Is fixed to the fan shroud (19) to the right and left frame of the frame (1), wherein the lower tank of the radiator (11A) and after cooler (13), toward the rear surface of the lower tank to said fan shroud (19) side Protruding outlet pipes (11d, 13d) are provided next to each other ,
The bracket (20) attached to the upper surface of the fan shroud (19) and the lower part of the fan shroud (19) are disposed above the outlet pipes (11d, 13d) of the radiator (11A) and the aftercooler (13). located and deposited by brackets (21), the radiator (11A) and the radiator at the bottom of the aftercooler both brackets when removing (13) the upper (20) (21) (11A) and aftercooler (13 The construction machine is characterized in that the brackets (20) and (21) are detachable from the fan shroud (19) so that the outlet pipes (11d, 13d) of the fan shroud do not interfere with the fan shroud (19). Cooling system. The outlet pipe (11d, 13d) of the radiator (11A) and the aftercooler (13) is configured to cut a part of the fan shroud (19) and pass through the cut part.
The bracket is attached to the lower portion of the fan shroud (19) (21) according to claim 1, characterized in that it is arranged so as to block a portion cut was the cut portion of the fan shroud (19) The cooling device for construction machines described in 1 .

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