JP2009113744A - Work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work vehicle capable of suppressing degradation of the cooling efficiency of an engine. <P>SOLUTION: The work vehicle 1 includes an engine, a radiator 15, a blower 16, a vehicle body 2 and a guide member 33. The radiator 15 is arranged behind the engine to cool the engine. The blower 16 generates the flow of air passing through the radiator 15. The vehicle body 2 has a second storage space S3 in which the radiator 15 and the blower 16 are stored, an air intake 23 through which air taken in from the outside into the second storage space S3 is formed in a back side, and a first side outlet 21 and a second side outlet 22 through which air blown outside from the second storage space S3 through the radiator 15 is passed are formed in a side surface. The guide member 33 guides the air so as to be blown out diagonally upwardly from the first side outlet 21 and the second side outlet 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a work vehicle.

Conventionally, work vehicles such as wheel loaders include a radiator for cooling an engine and a blower. The radiator is stored in a storage space provided in the vehicle body of the work vehicle. In addition, a suction port for taking air into the storage space is provided on the back surface of the vehicle main body, and a blowout port for discharging air from the storage space to the outside is provided on the side surface of the vehicle main body. . And by the effect | action of an air blower, external air is suck | inhaled in storage space from a suction inlet, passes along a radiator, and is blown | emitted outside from the blower outlet provided in the side surface of the vehicle main body.
JP-A-8-276755

  However, in a work vehicle such as that described above, there is a risk that high-temperature air blown out from the air outlet will be sucked into the storage space again from the air inlet. In particular, when the work vehicle travels forward, the air blown from the air outlet flows toward the rear of the vehicle body, and is thus easily sucked from the suction port provided on the back surface of the vehicle body. If the high-temperature air blown out from the air outlet is sucked in from the air inlet, the cooling efficiency of the engine is lowered.

  The subject of this invention is providing the work vehicle which can suppress the fall of the cooling efficiency of an engine.

  A work vehicle according to a first invention includes an engine, a radiator, a blower, a vehicle body, and a guide member. The radiator is disposed behind the engine and is for cooling the engine. A blower is a device that generates a flow of air through a radiator. The vehicle body has a storage space inside which the radiator and the air blower are stored, and a suction port through which air taken into the storage space from the outside passes is provided on the back, and blows out from the storage space through the radiator. The air outlet through which the air is passed is provided on the side. And a guide member guides air so that it may blow off toward the diagonally upward from a blower outlet.

  In this work vehicle, air is blown obliquely upward from the blowout port. For this reason, compared with the case where air blows off horizontally from a blower outlet, the high temperature air sucked into a suction inlet after being blown off from a blower outlet can be reduced. Thereby, the fall of the cooling efficiency of an engine can be suppressed.

  In this invention, compared with the case where air blows off horizontally from a blower outlet, the high temperature air suck | inhaled by a suction inlet after being blown off from a blower outlet can be reduced. Thereby, the fall of the cooling efficiency of an engine can be suppressed.

  A work vehicle 1 according to an embodiment of the present invention is shown in FIGS. 1 and 2. The work vehicle 1 is a wheel loader, and is capable of self-propelled when the tires 4 a and 4 b are rotationally driven, and can perform a desired work using the work machine 3. 1 is an external perspective view of the work vehicle 1 as viewed obliquely from the rear, and FIG. 2 is a diagram illustrating an internal structure of a rear portion of the work vehicle 1.

[Appearance structure]
The work vehicle 1 includes a vehicle body 2, a work implement 3, and tires 4a and 4b.

  A work machine 3 and a pair of front tires 4 a are attached to the front portion of the vehicle body 2. The work machine 3 is a device driven by pressure oil from a hydraulic pump (not shown), and includes a lift arm 6 attached to the front portion of the vehicle body 2 and a bucket 7 attached to the tip of the lift arm 6. And a work machine cylinder 8 for driving them.

  A driver's cab 5 is placed in the center of the vehicle body 2. Inside the cab 5, a seat on which an operator is seated and various operation devices are provided.

  The rear part of the vehicle body 2 is constituted by a tank 10, an engine hood 11, a back grill 12, a vehicle body frame 13 (see FIG. 2), and the like, and a storage space for storing an engine 14, a radiator 15, a blower 16 and the like which will be described later. S1 (see FIG. 2) is provided inside.

  The tank 10 is disposed behind the cab 5 and stores hydraulic oil for driving the work machine 3 therein.

  The engine hood 11 is disposed behind the tank 10 and is a member that covers the upper side and both sides of the storage space S1. As shown in FIG. 2, the storage space S1 is divided forward and backward by a partition wall 29 and divided into a first storage space S2 and a second storage space S3. From the upper surface of the engine hood 11, an air cleaner 17 and an exhaust pipe 18 protrude upward. An upper air outlet 19 that communicates with the second storage space S <b> 3 is provided on the upper surface of the engine hood 11. The upper air outlet 19 is divided into a plurality of slits by a lattice-like member. Further, side air outlets 21 and 22 communicating with the second storage space S3 are provided on both side surfaces of the engine hood 11. As shown in FIG. 3, the side air outlet 21 provided on the right side surface of the vehicle body 2 is hereinafter referred to as a “first side air outlet 21”. Further, the side air outlet 22 provided on the left side surface of the vehicle body 2 is hereinafter referred to as a “second side air outlet 22”. The first side outlet 21 is divided into a plurality of slits extending in the horizontal direction. The second side air outlet 22 has the same structure as the first side air outlet 21. 3 is a cross-sectional view taken along the line III-III in FIG.

  The back grill 12 is a member that is provided behind the engine hood 11 and covers the back of the second storage space S3. The rear grill 12 is provided with a suction port 23 that communicates with the second storage space S3. The suction port 23 is divided into a plurality of slits by a lattice-like member. The back grill 12 is provided so as to be rotatable around the upper end portion, and can open and close the second storage space S3.

  The vehicle body frame 13 supports the tank 10, the engine hood 11, the back grill 12, and the like, and covers the lower part of the storage space S1. A bumper 24 is provided at the rear end portion of the vehicle body frame 13, and the upper surface of the bumper 24 is located at substantially the same height as the lower end portion of the rear grill 12 described above. Note that rear tires 4b are provided on both sides of the vehicle body frame 13, respectively.

[Internal configuration]
As shown in FIG. 2, an engine 14, a radiator 15, and a blower device 16 are stored in the storage space S <b> 1 of the work vehicle 1.

  The engine 14 is stored in the first storage space S2 located on the front side.

  The radiator 15 is a device that cools the engine 14 by circulating a coolant. The radiator 15 is disposed behind the engine 14 and is stored in the second storage space S3.

  In addition, cooling devices such as an aftercooler 41 and an oil cooler 42 are disposed behind the radiator 15 facing the back grill 12. The aftercooler 41 cools the compressed air supplied to the engine 14 in order to improve the performance of the engine 14. The oil cooler 42 cools the hydraulic oil supplied to the hydraulic equipment.

  The blower device 16 includes a motor (not shown) and a cooling fan 27. The cooling fan 27 is rotationally driven by a motor. The blower 16 generates a flow of air that passes through the radiator 15 by rotationally driving the cooling fan 27. The air blower 16 is disposed between the radiator 15 and the engine 14.

  The first side air outlet 21 described above is located in front of the radiator 15 and rearward of the partition wall 29, and is disposed at a position facing the cooling fan 27 on the side of the cooling fan 27. The first side air outlet 21 has a first air outlet 31 and a second air outlet 32. The 1st blower outlet 31 and the 2nd blower outlet 32 are arrange | positioned along with the upper and lower sides, the 1st blower outlet 31 is arrange | positioned at the upper side, and the 2nd blower outlet 32 is arrange | positioned at the lower side. The upper end portion of the first air outlet 31 is located at substantially the same height as the upper end portion of the suction port 23. Further, the lower end portion of the second outlet 32 is positioned slightly above the lower end portion of the suction port 23 and the upper surface of the bumper 24.

  As shown in FIG. 3, a plurality of guide members 33 are provided inside the first side outlet 21 and the second side outlet 22. The guide member 33 is a member that guides air so that air is blown obliquely upward from the first side outlet 21 and the second side outlet 22. Each of the guide members 33 is a plate-like member, and is arranged in parallel to each other with a distance in the vertical direction. The guide member 33 is disposed so as to be inclined such that the inner end portion is positioned below the outer end portion, and thereby air can be guided obliquely upward. For example, the guide member 33 is inclined at an angle of 45 degrees with respect to the horizontal direction. In FIG. 3, only some of the guide members 33 are denoted by reference numerals, and others are omitted.

〔Characteristic〕
In the work vehicle 1, when the blower 16 is driven, air is taken into the second storage space S <b> 3 from the suction port 23 provided on the back surface of the vehicle body 2. The air taken into the second storage space S3 passes through the radiator 15 from the rear to the front. Thereby, the coolant of the radiator 15 is cooled. The air that has passed through the radiator 15 is divided into an upper part and both sides, and is blown out from the upper air outlet 19, the first side air outlet 21, and the second side air outlet 22.

  Here, the figure which showed typically the blowing of the air in the working vehicle 1 is shown in FIG. In FIG. 4, in the work vehicle 1 moving forward at a predetermined speed, the flow of air blown from the upper air outlet 19, the first side air outlet 21, and the second side air outlet 22 is indicated by a two-dot chain line. ing. As a comparative example, FIG. 5 schematically shows air blowing when air is blown out from the first side outlet 21 and the second side outlet 22 in the horizontal direction. The work vehicle 100 according to this comparative example uses the same conditions as the work vehicle 1 of FIG. 4 except that the guide member 33 is not provided.

  As can be seen from FIGS. 4 and 5, in the work vehicle 1 according to the present embodiment, the air blown out from the first side outlet 21 and the second side outlet 22 flows to the rear of the vehicle body 2. , Does not go down to the lower part of the bumper 24. Thereby, a space in which high-temperature air does not flow is secured in the vicinity of the lower portion of the suction port 23. On the other hand, in the work vehicle 100 according to the comparative example, the high-temperature air blown out from the first side outlet 21 and the second side outlet 22 wraps around below the bumper 24. In addition, the entire vertical direction of the suction port 23 is covered with high-temperature air.

  As described above, in the work vehicle 1, it is possible to reduce high-temperature air that is sucked into the suction port 23 after being blown out from the first side outlet 21 and the second side outlet 22. Thereby, the fall of the cooling efficiency of the engine 14 can be suppressed.

[Other Embodiments]
(A)
In the above embodiment, 20 guide members 33 are provided at the first side outlet 21, and 20 guide members 33 are also provided at the second side outlet 22, for a total of 40 pieces. However, the number of guide members 33 is not limited to this.

  Further, the inclination angle of the guide member 33 is not limited to the above.

(B)
In said embodiment, although the 1st side blower outlet 21 is divided into the 1st blower outlet 31 and the 2nd blower outlet 32, the shape of the 1st side blower outlet 21 is not restricted to this. For example, the 1st side part blower outlet 21 may be comprised integrally. The same applies to the second side outlet 22.

  Moreover, in said embodiment, although the 1st side part outlet 21 and the 2nd side part outlet 22 are partitioned off into the some slit shape extended in a horizontal direction, the 1st side part outlet 21 and the 2nd The shape of the side outlet 22 is not limited to this. For example, the first side air outlet 21 and the second side air outlet 22 may be partitioned in a lattice shape.

(C)
In the above embodiment, the guide member 33 is inclined at an angle of 45 degrees with respect to the horizontal direction, but the inclination angle of the guide member 33 is not limited to this, and may be arranged at an angle different from the above.

(D)
In the above embodiment, a wheel loader is illustrated as the work vehicle 1, but the present invention can also be applied to other work vehicles.

  INDUSTRIAL APPLICABILITY The present invention has an effect capable of suppressing a decrease in engine cooling efficiency, and is useful as a work vehicle.

The external appearance perspective view of a working vehicle. The side view which shows the internal structure of a working vehicle. III-III sectional drawing in FIG. 2 which shows the internal structure of a working vehicle. The figure which shows typically the flow of the blowing air in the working vehicle which concerns on this embodiment. The figure which shows typically the flow of the blowing air in the working vehicle which concerns on a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 2 Vehicle main body 14 Engine 15 Radiator 16 Blower 21 First side air outlet (air outlet)
22 Second side air outlet (air outlet)
23 Suction port 33 Guide member

Claims (1)

Engine,
A radiator disposed behind the engine for cooling the engine;
A blower for generating a flow of air through the radiator;
There is a storage space inside which the radiator and the blower are stored, a suction port through which air taken into the storage space from the outside passes is provided on the back surface, and the storage space passes through the radiator to the outside. A vehicle body provided on the side surface with an outlet through which blown air passes;
A guide member that guides air so as to be blown obliquely upward from the blowout port;
Work vehicle equipped with.

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