JP2002154340A - Control box cooling structure for working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control box cooling structure for a working vehicle capable of controlling the control box provided between an engine room and a driver seat heated by heat from the engine room. SOLUTION: The control box 24 is provided between the engine room 10 and the driver seat 9. An outer air vent 29 opening in the driver seat 9 is provided on a driver seat side cover 25 constructing the control box 24. An inside of the control box 24 is forcedly sucked by an engine 21 to generate cooling airflow in the control box 24 for cooling the control box 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle cooling structure for cooling a control box in a work vehicle having a driver's seat and an engine room adjacent to each other with a control box interposed therebetween.

[0002]

2. Description of the Related Art As a conventional work vehicle, there is known a small cleaning vehicle of a riding type shown in FIG. The cleaning car 40 includes a hopper 42 for collecting collected dust at a rear portion of a frame constituting the vehicle body 41, and a driver's seat 43 and an engine room 44 at a front portion with a control box interposed therebetween and adjacent to each other. ing. The engine room 44 is covered with a cover 45, and a radiator 46, a cooling fan 47, and an engine 48 are housed in the engine room 44. In the engine room 44, air is sucked as cooling air by a cooling fan 47, and the cooling air passes through a radiator 46 and is cooled.
The gas is exhausted to the outside through the exhaust port 9. The engine room side cover 50 that partitions the driver's seat 43 and the engine room 44 is provided with a heat insulating material 51 and a control box 52. Control box 5
Inside 2, a manual operation valve for operating various hydraulic drive units of the cleaning truck 40 and an operation means 54 of the brush 53 are provided.

A working vehicle is disclosed in Japanese Patent Laid-Open No. 10-25 / 1998.
No. 2468 discloses one. The vehicle has a driver's seat on a frame and an engine room separated by a cover on the rear side of the driver's seat. The engine room has an engine, a cooling fan, and a radiator in the left-right direction. A cover on the rear side of the driver's seat is provided with a duct cover, and the cover and the duct cover constitute an intake duct. The intake duct is provided such that the duct intake port is opened to the side of the work vehicle, the duct exhaust port is provided on the cooling fan side, and the engine intake pipe is opened in the intake duct. . The air is drawn into the engine room and the engine as cooling air by the cooling fan and the intake pipe through the intake duct as the cooling air, and the radiator is cooled and exhausted to the outside. At this time, the temperature rise of the cover on the back side of the driver's seat is suppressed, and the heat inside the engine room is cut off by the cooling air.
This prevents the heat in the engine compartment from being transmitted to the driver's seat.

[0004]

In the prior art, the radiator and the engine are cooled by the cooling air sucked into the engine room by the cooling fan, but the cooling air is heated to a high temperature by the heat transmitted from the radiator and the engine. The temperature of the engine room becomes high due to the heated cooling air. Since heat in the engine compartment warms the engine compartment cover and transfers the heat to the driver's seat side, it is necessary to provide a heat insulating material in the cover. In addition, the heat inside the engine room heats the air inside the control box in a substantially closed state, and the air inside the control box is trapped, so the heat transmitted from the engine room is not sufficiently radiated, and the control box and the control There has been a problem that the temperature of the air inside the box becomes high and the heat is transmitted to the driver, thereby deteriorating the working environment. Further, the air which has passed through the radiator and became hot has been undesirably drawn by the engine from the intake port through the air cleaner.

[0005] In addition, a structure is adopted in which air around the engine is taken in by a fan, the radiator is cooled, and then exhausted. The intake duct for the intake duct is provided so as to open to the side of the work vehicle, that is, to the outer periphery. Therefore, if the cleaning vehicle is used as it is as a working vehicle, dust is sucked into the engine together with air, which is not preferable. In addition, a cooling fan is arranged downstream with respect to the flow of cooling air, and the engine room has a negative pressure tendency.If the engine room is not configured to be completely sealed, the engine room enters the engine room through a gap such as an engine cover. Dust is easily sucked, and air contaminated by dust is sucked into the engine room from around the engine, so that dust accumulates on the engine and causes failure of engine parts. Further, since the duct cover is provided in the engine compartment, there is a case where there is no space in a small work vehicle, and there is a case where it is difficult to provide the intake duct.

Japanese Patent Application Laid-Open No. Hei 11-200418 and Japanese Utility Model Laid-Open Publication No. Hei 5-47059 have an engine room separated by a cover at the rear side of the driver's seat. A device that cools the inside of a driver's seat (the cabin) by taking in air from the inside through a duct is disclosed. These cool the interior of the cabin where the driver's seat is provided.
In No. 200418, a duct is formed in a structural member also serving as an engine room. However, there is no description about a configuration in which an air flow flows over the entire lower wall, which is a structural member on the driver's seat side, for cooling. In addition, Japanese Utility Model Application No. 5-47059,
It only sucks the hot air inside the cabin. Further, in these articles, there is no description that the control box is used as a duct.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control box cooling structure for a work vehicle, in which air sealed in a control box is heated and heat in an engine room is prevented from being transmitted to a driver via the control box. It is.

[0008]

According to the present invention, an operating device for operating a working device is housed between an engine room in which a radiator, a cooling fan and an engine are housed and arranged, and a driver's seat. In a work vehicle comprising a control box, wherein the air sucked by the fan cools the radiator and flows through the engine room and is exhausted, the sucked air flows in the order of the radiator, the fan, and the control box. An outside air communication port for taking in outside air is provided, and suction means for forcibly sucking the air in the control box from the suction port is provided (claim 1). According to this, it is possible to prevent the heat from being trapped in the control box and to cool the control box with the outside air, thereby suppressing the transfer of the heat to the driver's seat side.

[0009] The outside air communication port of the control box is provided near the longitudinal end of the control box and opened to the driver's seat side, and the suction port is provided near the other end in the longitudinal direction. (Claim 2). According to this, clean air having a low temperature around the driver's seat can be sucked into the control box and can be circulated through the control box.

[0010] The suction means is an engine, and the suction port of the engine communicates with the suction port of the control box. Further, the suction means is a cooling fan (claim 4). According to these, it is not necessary to provide any special suction means, and it is suitable for a small-sized work vehicle having no space. Further, in claim 3, it is preferable that clean air can be taken into the engine.

The driver's seat side cover and the engine room side cover of the control box are erected from the upper surface of the frame of the vehicle body. The forcible suction is performed from the front side in the front-rear direction of the work vehicle (claim 5). According to this, the driver's seat and the engine room are separated by two covers, and the air (suction airflow) between the two covers serves as a heat insulation band and a sound insulation band. The sound insulation effect on the sound is increased. In addition, since the outside air communication port and the forced suction position are separately provided in the front-rear direction of the work vehicle so that the air flow due to the forced suction becomes wide along the control box, the cooling efficiency in the control box is improved. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. A riding type small cleaning truck 1 shown as a work vehicle is a well-known type. A front wheel 3 and a rear wheel 4 are provided before and after a vehicle body 2, and a side brush 5 is provided beside the front wheel 3. ing. In addition, a sweeping device 7 for sweeping dust collected by the side brush 5 with a brush 6 is provided below the vehicle body 2 in front of the rear wheel 4. A hopper 8 that collects dust swept up by the sweeping device 7 is provided at a rear portion of the vehicle body 2.

A driver's seat 9 is provided on one side (right side in FIG. 3) of the front part of the vehicle body 2 in the vehicle width direction. An engine room 10 is provided on the side (left side in FIG. 3) of the driver's seat 9. The engine room 10 includes an engine room side cover 12 that rises from a frame 11 that forms the vehicle body 2 at substantially the center in the width direction of the vehicle body 2, a side cover 13 and an upper surface cover 14, a partition 15 in front of the hopper 8, and a front cover 17. The lower part of the engine 21 is covered so that the engine cooling air does not blow downward. The side cover 13 is provided with an exhaust port 16 for exhausting cooling air in the engine room 10. An air chamber 20 is formed in front of the engine room 10 by a front cover 17 and an inner cover 19 in front of a radiator 18. In this engine room 10, an engine 21 is provided.
The engine 21 is housed and arranged so that the longitudinal direction of the output shaft of the engine 21 extends in the longitudinal direction (front-rear direction) of the vehicle body 2, and a cooling fan 22 is housed and arranged in the engine room 10 in front of the engine 21. Cooling fan 22 and air chamber 20
The radiator 18 is housed and arranged between them. An outside air inlet 23 is formed in a portion of the front cover 17 corresponding to the radiator 18. At a position corresponding to the radiator 18 on the inner cover 19, an appropriate hole through which air sucked into the engine room by the cooling fan 22 can pass is formed.

A control box 24 is disposed between the engine room 10 and the driver's seat 9. The control box 24 is provided between the engine room side cover 12 and the body frame 11 adjacent to the engine room side cover 12. It is composed of an upright driver's seat side cover 25, the partition wall 15 in front of the hopper 8, a control box upper surface cover 26, an inner cover 19, and a frame floor. In the control box 24, there are provided a manual operating valve 27 for controlling hydraulic devices such as a lifting / lowering cylinder of a hopper and a hydraulic motor for driving a brush, and an operating device 28 for operating the brush 5. , Those operating levers 2
7a and 28a protrude from the control box top cover 26. An outside air communication port 29 for taking in outside air is provided at a rear end portion of the driver seat side cover 25 in the vehicle body longitudinal direction. A suction port 30 is provided at a front end portion of the engine compartment side cover 12 in the vehicle front-rear direction, and the suction port 30 is provided with an intake port 31 of the engine 21.
It communicates via two.

The engine 21 operates a pressure oil pump 34 for supplying pressure oil to each hydraulic drive device for driving the side brush 5 and the sweeping brush 6 and the like.
Are connected to the control box 24 via the air cleaner 32 as described above, and serve as suction means for forcibly sucking the air in the control box 24. The cooling fan 22 driven by the engine 21 takes in cooling air from the front of the vehicle body into the engine room 10 through the outside air inlet 23 to cool the radiator 18.

When the engine 21 is driven by the operation of the cleaning car 1, hydraulic oil is supplied from a hydraulic pump 34 to each of the hydraulic driving devices, and the side brush 5 and the sweeping device 7 are driven to collect dust on the cleaning surface. Cleaning work is performed. When the engine 21 is operated, the air in the control box 24 is forcibly sucked from the intake port 31 through the air cleaner 32. Further, the operation of the engine 21 drives the cooling fan 22, and sucks outside air as cooling air from the outside air inlet 23 at the front of the vehicle body through the air chamber 20. The air sucked by the cooling fan 22 flows in the order of the radiator and the fan as shown by the arrow in FIG. 2 and flows from the front to the rear of the cooling fan. At the same time, the cooling air that cools the interior of the engine room 10 is cooled, the radiator 18 is cooled as shown by an arrow in FIG.

When the air in the control box 24 is forcibly sucked by the engine 21, the air around the driver's seat 9 is sucked into the control box 24 from the outside air communication port 29, and the sucked air flows through the entire inside of the control box 24. It flows as cooling air and suppresses the transfer of heat in the engine compartment 10 to the driver's seat 9 and also cools the entire covers 12, 15, 25 and 26 constituting the control box 24 and suppresses heat. In particular, the driver's seat side cover 25 near the driver and the control box top cover 26
Is cooled, the heat is not radiated toward the driver, and even if the control box top cover 26 and the driver's seat side cover 25 are touched when operating the operation levers 27a and 28a, the heat is increased. Absent. The cooling air in the control box 24 flows from the outside air communication port 29 on the rear side in the vehicle body longitudinal direction of the control box 24 to the front suction port 3.
It flows so as to cool the entire inside of the control box 24 toward zero, and forms an insulating band between the engine room side cover 12 and the driver's seat side cover 25. In addition, the cooling air flowing through the control box 24 forms a sound-insulating zone, and the engine compartment 1
Prevents noise inside 0 from being transmitted to the outside (driver's seat 9 side). As described above, the cooling air in the engine room 10 becomes the heat insulation band and the sound insulation band, so that the heat insulating material conventionally provided in the engine room becomes unnecessary.

When cleaning the cleaning truck 1, the side brush 5 and the sweeping brush 6 are driven to drive the cleaning truck 1.
Dust soars around the driver's seat, but since the driver's seat 9 is surrounded by a cover or the like, dust is unlikely to enter the driver's seat 9, and the outside air communication port of the control box 24 is directed toward the driver's seat 9. Since the opening 29 is open, low-temperature and clean air in the driver's seat 9 is sucked into the control box 24. Further, since the inside of the engine compartment 10 tends to have a high pressure, dust hardly enters through gaps between the covers forming the engine compartment 10. Therefore, the engine 21 can suck clean air from the intake port 31. Since the control box 24 is formed as a passage through which the cooling air flows, it is preferable to provide no special cooling passage.

FIG. 4 shows another embodiment.
The same parts as those of the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. This is because the inside of the control box 24 communicates with the air chamber 20, and the cooling fan 2 replaces the engine 21.
2 is a suction means, and the air in the control box 24 is sucked by the cooling fan 22 to generate cooling air.

The suction of air in the control box 24 may be performed by both the engine 21 and the cooling fan 22. In addition, if the engine 21 or the cooling fan 22 is used as the suction means as described above, there is no need to provide a separate suction means, which is preferable for a small work vehicle having a small space margin. Separate suction means may be provided. Also, the outside air communication port 29 is connected to the control box top cover (upper cover).
26 may be provided at the longitudinal end of the vehicle body. The outside air inlet 23 does not need to be on the front surface of the radiator 18, but may be provided on the side surface or upper surface to communicate with the air chamber 20. Further, if a silencer is provided between the intake port 31 and the suction port 30, the soundproofing effect is improved.

[0021]

As described above, according to the present invention, the outside air communication port is provided in the control box, and the air in the control box is cooled by the air in the control box being forcibly sucked by the suction means. In addition, since the inside of the control box is cooled and a heat insulating zone is formed, heat from the engine room is not easily transmitted to the driver's seat. Further, the cooling air in the control box functions as a soundproof member and has an effect of insulating noise in the engine room. Further, since the inside of the control box is formed as a duct through which the cooling air flows, there is no need to provide a new cooling duct and the space is not taken up. Furthermore, if the engine and the cooling fan are used as the suction means, there is no need to provide a separate suction means and no space is required. In addition, since the outside air communication port is opened toward the driver's seat at a substantially central position in the width direction of the work vehicle, clean air around the driver's seat is sucked, which is particularly suitable when the suction means is an engine.

[Brief description of the drawings]

FIG. 1 is a side view of a work vehicle.

FIG. 2 is a plan view showing a part of a working vehicle in a cross section.

FIG. 3 is a front view of the work vehicle.

FIG. 4 is another embodiment.

FIG. 5 is a conventional technique.

[Explanation of symbols]

 2 body 9 driver's seat 10 engine room 11 frame 12 engine room side cover 18 radiator 21 engine (suction means) 22 cooling fan (suction means) 24 control box 25 driver's side cover 26 control box top cover (upper cover) 29 outside air communication Mouth 31 Inlet

Claims (5)

[Claims] A control box for accommodating an operating device for operating a working device between an engine room accommodating a radiator, a cooling fan, and an engine; and a driver's seat, wherein air sucked by the fan is supplied to the radiator. In a working vehicle configured to cool and exhaust through the engine room, the sucked air has a radiator,
A control box cooling structure for a work vehicle, comprising: a control box, an outside air communication port for taking in outside air, and suction means for forcibly sucking air in the control box from a suction port. 2. The outside air communication port of the control box is
2. The control box for a working vehicle according to claim 1, wherein the control box is provided near the longitudinal end of the control box so as to open toward the driver's seat, and the suction port is provided near the other end in the longitudinal direction. Cooling structure. 3. The control box cooling structure for a working vehicle according to claim 1, wherein the suction means is an engine, and an intake port of the engine communicates with a suction port of the control box. 4. The control box cooling structure for a work vehicle according to claim 1, wherein the suction means is a cooling fan. 5. A driver's seat side cover and an engine room side cover of the control box are erected from the upper surface of a frame of the vehicle body, and an outside air communication port is provided on a rear side of the driver's seat side cover in the front-rear direction of the work vehicle. The control box cooling structure for a work vehicle according to any one of claims 1 to 4, wherein air is forcibly sucked from a front side of the work vehicle in the front-rear direction.