JP4489375B2 - Air intake device for construction machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine cooling radiator and an air intake device that sucks outside air into an engine intake air cleaner mounted on a construction machine such as a hydraulic excavator or a work vehicle.
[0002]
[Prior art]
Regarding an outside air intake structure of an engine cooling radiator and an engine intake air cleaner installed in a construction machine such as a hydraulic excavator, for example, Patent Document 1 describes an intake structure of a construction machine.
[0003]
FIG. 6 is a perspective view showing the intake structure described in Patent Document 1. In FIG. In FIG. 6, an air cleaner chamber 52 is provided in the vicinity of a radiator chamber in which an unillustrated engine cooling radiator is disposed, and an air cleaner 50 is disposed in the vicinity of the ceiling surface of the air cleaner chamber 52. An intake duct 60 is provided between the air cleaner 50 and the radiator chamber, and a radiator vent (not shown) for sucking outside air is provided above the radiator chamber. An air cleaner ventilation opening 61 opened to the outside is formed on the upper surface of the intake duct 60, and a ventilation hole 62 opened to the radiator chamber is formed on the surface facing the radiator chamber. An intake box 63 is provided at a corner of the intake duct 60 on the air cleaner 50 side. The intake box 63 is formed in a box shape by shielding plates 64, 65, and 66 that cover the upper portion, the surface portion on the side of the ventilation hole 62, and the left and right side portions thereof, and the holes formed in the surface portion on the air cleaner 50 side. The air cleaner 50 is connected to the air intake port 51 of the air cleaner 50, and the lower surface portion opens into the air intake duct 60.
[0004]
According to the above configuration, since the cooling air is supplied to the radiator chamber from the air cleaner vent 61 provided on the upper surface of the intake duct 60 and the radiator vent provided above the radiator chamber, a large intake opening is obtained. The engine cooling efficiency can be sufficiently increased. In addition, since intake air is supplied to the intake port 51 of the air cleaner 50 from the lower surface opening of the intake box 63, rainwater or the like can be prevented from being sucked into the air cleaner 50.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-229432 (page 4-5, FIG. 8)
[0006]
[Problems to be solved by the invention]
However, in the conventional configuration described in Patent Document 1, the air cleaner vent 61 formed on the upper surface of the air intake duct 60 provided between the air cleaner 50 and the radiator chamber has a portion close to the inside of the vehicle body, such as an engine. Outside air heated by the on-vehicle equipment is sucked in. Since the outside air is sucked from the intake port 51 of the air cleaner 50 via the intake duct 60, the cooling efficiency and intake efficiency of the engine may be reduced, and the engine may not be able to exhibit its maximum capacity. It is necessary to mount a large engine with a margin more than the maximum output, resulting in an increase in manufacturing cost. Further, the air intake duct 60 and the air intake box 63 having a box structure are complicated in structure and have a problem of high manufacturing cost.
[0007]
The present invention has been made by paying attention to the above-mentioned problems, and is a construction machine that has a simple structure and that can sufficiently increase the cooling efficiency and intake efficiency of the engine and allow the engine to exhibit its maximum capacity. An object is to provide an intake device.
[0008]
[Means, actions and effects for solving the problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided an intake device for a construction machine having an air cleaner disposed on a side of an engine, an exterior panel that covers an engine room housing the engine and a radiator, An air intake for cooling the engine provided in a side portion with respect to a vertical line of the cooling surface of the radiator, a duct disposed between the air intake and the radiator, and an air intake Furthermore, it is provided in the vicinity of the vehicle body side end portion of the exterior panel on the outside of the vehicle body, and has an outside air intake port for introducing outside air to the air cleaner inlet through the outside of the duct .
[0009]
According to the first invention, since the outside air intake for air cleaner intake is provided in the vicinity of the side end of the vehicle body, it is possible to supply the air cleaner with low temperature outside air that is not affected by the heat of the engine or the like. The intake efficiency of the engine can be improved and the maximum capacity of the engine can be demonstrated. Further, since air for cooling the radiator is taken in via the air intake port provided on the side of the radiator, air can be taken in separately from the air cleaner, and the engine cooling efficiency can be increased.
[0010]
According to a second aspect of the present invention, in the intake device for a construction machine having an air cleaner disposed on the side of the engine, the exterior panel that covers the engine room storing the engine and the radiator is provided in front of the cooling surface of the radiator in the vertical direction. An air intake opening for cooling the engine, an air intake for cooling the engine provided on a side portion of the exterior panel with respect to a vertical line of the cooling surface of the radiator, the air intake, and the radiator And a duct disposed between the air inlet and the vehicle body side end of the exterior panel further outside the air intake port, and circulates outside the duct to introduce outside air into the air cleaner inlet. And an outside air intake port.
[0011]
According to the second aspect of the invention, in order to take in the air for cooling the radiator, the air intake opening portion in front of the radiator (that is, the front in the vertical line direction of the cooling surface of the radiator) and the air intake port on the side of the radiator are provided. In addition to the air cleaner, air can be taken in and a large opening area can be obtained as a whole, so that the engine cooling efficiency can be sufficiently increased. In addition, since the outside intake for air cleaner intake is provided near the side edge of the vehicle body, low temperature outside air that is not affected by the heat of the engine etc. can be supplied to the air cleaner, and the intake efficiency of the engine Can be improved and the engine can exert its maximum capacity.
[0012]
According to a third invention, in the first or second invention, below the air intake port, outside air taken from the air intake port is guided to the radiator side, and the outside air flows to the suction port of the air cleaner. A partition plate that shields the air is provided , and a seal member for closing a gap between the partition plate and the air cleaner is further provided .
[0013]
According to the third invention, the outside air taken in from the air intake is guided to the radiator by the partition plate provided below the air intake provided on the side of the radiator, and the flow of the outside air to the air cleaner intake port Is shielded. For this reason, the outside air whose temperature has increased due to the influence of the engine or the like is not supplied to the air cleaner, so there is no possibility of reducing the intake efficiency of the engine.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
FIG. 1 is a side view of a rear part of a vehicle body of a hydraulic excavator (an overall view is not shown) as an example of a construction machine, FIG. 2 is a plan view thereof, and FIG. 3 is a view taken along the line AA in FIG. . 1 to 3, an engine chamber 8 for storing the engine 12 and the radiator 10 is provided at the rear part of the upper swing body 1, and a counterweight 3 is provided at the rear end part. The engine room 8 includes an exterior panel 7 that covers the upper surface and side surfaces of the engine room 8, and a hood 2 that covers an upper part of the engine room 8, such as the engine 12 and the radiator 10, that protrudes upward from the exterior panel 7. An engine cooling radiator 10, an outside air suction type cooling fan 11 and an engine 12 are arranged in series in the left-right direction of the vehicle inside the engine room 8, and an air cleaner is disposed on the side of the radiator 10 opposite to the counterweight 3. 13 is disposed, and a fuel tank 15 is disposed on the side of the air cleaner 13 opposite to the radiator 10. A first door 4 that can be opened and closed is provided at a position substantially facing the cooling surface of the radiator 10 on the vehicle right side of the exterior panel 7, that is, at a position in front of the cooling surface of the radiator 10 in the vertical line direction. A second door 5 that can be opened and closed is provided at the facing position. These first door 4 and second door 5 open and close as shown by a two-dot chain line in FIG. Partition walls 16, 17, 18 are provided between the radiator 10 and the air cleaner 13, between the air cleaner 13 and the fuel tank 15, and on the side of the air cleaner 13 opposite to the second door 5, respectively. The rear side, the front side and the inner side are surrounded by the partition walls 16, 17 and 18.
[0016]
Further, a first air intake opening 6a for cooling the radiator is provided in a side surface portion of the hood 2 on the radiator 10 side (also located in front of the cooling surface of the radiator 10 in the vertical line direction). A second air intake opening 6b and a third air intake opening 6c are provided in the vicinity of the first door 4 on the upper surface side of the panel 7 and in the first door 4, respectively. Further, on the upper surface side of the exterior panel 7, on the side opposite to the counterweight 3 of the radiator 10 and above the air cleaner 13, an upper surface plate 31 in which an air inlet 20 for cooling the radiator is formed is provided. ing.
[0017]
Further, between the air intake 20 and the second door 5, an external air intake 21 for supplying intake air to the air cleaner 13 is provided in the exterior panel 7 in the vicinity of the end on the second door 5 side. ing. That is, the outside air inlet 21 is provided closer to the outer end of the vehicle body than the air inlet 20.
[0018]
A partition plate 30 is provided below the air intake 20 to guide the outside air taken in from the air intake 20 to the radiator 10 and to block the flow of the outside air to the suction port 14 of the air cleaner 13. . Below the partition plate 30, the inlet 14 of the air cleaner 13 is disposed.
[0019]
Next, the partition plate 30 will be described in detail with reference to a perspective view of the structure of the partition plate 30 shown in FIG. In FIG. 1 and FIG. 4, below the air intake port 20 provided in the upper surface plate 31, there are an air guide plate 33 inclined downward from the lower surface of the upper surface plate 31 toward the radiator 10, and the air guide plate 33. A pair of side plates 34, 34 erected on the left and right with respect to the tilt direction are attached. The air guide plate 33 and the pair of left and right side plates 34, 34 constitute a duct toward the radiator 10, and an opening 32 is formed at the end of the duct on the radiator 10 side. Further, the side plate 34 on the second door 5 side is provided with a shielding plate 35 extending downward. Further, a synthetic resin such as urethane or hard rubber is provided between the lower surface portion of the air guide plate 33 on the radiator 10 side and the outer surface of the air cleaner 13 and between the lower portion of the shielding plate 35 and the outer surface of the air cleaner 13. Seal members 36 and 37 made of the above are attached, respectively, to close the gap with the air cleaner 13 disposed below the partition plate 30. The suction port 14 of the air cleaner 13 opens in a space surrounded by a pair of left and right side plates 34, 34 below the air guide plate 33.
[0020]
Next, the effect | action of the partition plate 30 is demonstrated based on the perspective view shown in FIG. In FIG. 5, since the air intake 20 is located inside the vehicle body (upper swing body 1), the temperature of the outside air taken in from the air intake 20 is influenced by the engine and hydraulic equipment (not shown). In many cases, the temperature is higher than the outside temperature. Even in such a case, the high temperature outside air is guided to the air guide plate 33 and the pair of left and right side plates 34 and 34 as shown by the arrows a and b in the drawing, and is all sucked from the opening 32 to the radiator 10 side. . Further, since the sealing members 36 and 37 are provided between the air guide plate 33 and the shielding plate 35 and the air cleaner 13, the high temperature outside air enters the shielding plate 35 and the sealing members 36 and 37 and sucks the air cleaner 13. The air cleaner 13 does not flow into the mouth 14 side, and the air cleaner 13 does not suck the outside air.
[0021]
Further, the outside air intake 21 provided in the vicinity of the left and right end portions (in the present example, the right end portion) of the upper surface portion of the exterior panel 7 is located away from the engine 12 (see FIG. 2). Therefore, the outside air temperature in the vicinity of the outside air inlet 21 does not rise due to the temperature of the engine or the like. A part of the outside air flows to the radiator 10 side as shown by an arrow c in the figure, but most of the outside air goes around the shielding plate 35 and the seal member 37 of the partition plate 30 as shown by arrows d and e. Then, the air is sucked from the suction port 14 of the air cleaner 13.
[0022]
Since the intake device for a construction machine according to the present invention is configured as described above, the following effects can be obtained.
[0023]
(1) Since the outside air is supplied to the radiator from a plurality of openings such as an air intake opening and an air intake, the entire opening area becomes sufficiently large, and the cooling efficiency of the engine can be increased. It should be noted that an air intake opening for cooling the engine and an air intake may be appropriately provided in accordance with the required air amount.
[0024]
(2) Since the air cleaner is supplied with low-temperature outside air that is not heated by the engine or the like from the outside air inlet formed near the left and right side ends of the vehicle, the intake efficiency of the engine is improved and the maximum capacity of the engine is exhibited. Can reduce the size and cost of the engine.
[0025]
(3) Since the suction port of the air cleaner is positioned below the partition plate and disposed in the space surrounded by the partition plate, the air cleaner can be prevented from sucking rain or the like. Since the partition plate also serves as a member for avoiding rain of the air cleaner, the structure for avoiding rain can be simplified.
[0026]
(4) Since the air cleaner is disposed in the vicinity of an openable / closable door (exterior cover), maintenance of the air cleaner is easy.
[0027]
(5) It is possible to configure an intake device for a construction machine with a simple structure and low cost.
[0028]
In the above-described embodiment, an example in which the air cleaner is disposed on the side of the radiator in the vehicle body has been described. Side). Moreover, although the hydraulic shovel is mentioned as an example of the application machine of this invention, the application machine of this invention is not limited to this, You may be another construction machine.
[Brief description of the drawings]
FIG. 1 is a side view of a rear portion of a vehicle body of a hydraulic excavator equipped with an intake device of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a view taken along arrow AA in FIG. 2;
FIG. 4 is a perspective view showing a configuration of a partition plate.
FIG. 5 is an explanatory view of the action of a partition plate.
FIG. 6 is a perspective view showing an intake structure of a construction machine according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper revolving body (vehicle body), 4 ... 1st door, 5 ... 2nd door, 6a, 6b, 6c ... Air intake opening part, 7 ... Exterior panel, 8 ... Engine room, 10 ... Radiator, 12 ... Engine , 13 ... Air cleaner, 14 ... Suction port, 16, 17, 18 ... Partition, 20 ... Air intake, 21 ... Outside air intake, 30 ... Partition plate, 31 ... Top plate, 32 ... Opening, 33 ... Air guide plate 34 ... side plates, 35 ... shielding plates, 36, 37 ... sealing members.

Claims (3)

In an intake device for a construction machine having an air cleaner (13) disposed on a side of an engine (12),
An exterior panel (7) covering the engine room (8) storing the engine (12) and the radiator (10);
An air inlet (20) for cooling the engine provided at a side portion of the exterior panel (7) with respect to a vertical line of the cooling surface of the radiator (10);
A duct disposed between the air intake (20) and the radiator (10);
The air intake (20) is further provided outside the vehicle body and in the vicinity of the end of the exterior panel (7) on the vehicle body side. The outside air circulates outside the duct and draws outside air into the air inlet (14) of the air cleaner (13). An intake device for a construction machine, comprising an outside air intake (21) for introduction . In an intake device for a construction machine having an air cleaner (13) disposed on a side of an engine (12),
Air intake opening for cooling the engine provided in the vertical direction of the cooling surface of the radiator (10) of the exterior panel (7) covering the engine room (8) storing the engine (12) and the radiator (10) Part (6a, 6b, 6c),
An air inlet (20) for cooling the engine provided at a side portion of the exterior panel (7) with respect to a vertical line of the cooling surface of the radiator (10);
A duct disposed between the air intake (20) and the radiator (10);
The air intake (20) is further provided outside the vehicle body and in the vicinity of the end of the exterior panel (7) on the vehicle body side. The outside air circulates outside the duct and draws outside air into the air inlet (14) of the air cleaner (13). An intake device for a construction machine, comprising an outside air intake (21) for introduction . The intake device for a construction machine according to claim 1 or 2,
Below the air intake port (20), outside air taken in from the air intake port (20) is guided to the radiator (10) side, and the outside air is introduced to the intake port (14) of the air cleaner (13). A partition plate (30) that shields the flow of air and further includes a seal member (36) for closing a gap between the partition plate (30) and the air cleaner (13). apparatus.

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